On the Trinity

Augustine of Hippo

On the Trinity

Augustine of Hippo (354–430)

First published 428

Augustine's De Trinitate, staged here in the public-domain NPNF English translation by Arthur West Haddan, revised by W. G. T. Shedd.


Book 1

Caput I: This Work is Written Against Those Who Sophistically Assail the Faith of the Trinity, Through Misuse of Reason. They Who Dispute Concerning God Err from a Threefold Cause. Holy Scripture, Removing What is False, Leads Us on by Degrees to Things Divine. What True Immortality is. We are Nourished by Faith, that We May Be Enabled to Apprehend Things Divine.

Caput II: In What Manner This Work Proposes to Discourse Concerning the Trinity.

Caput III: What Augustin Requests from His Readers. The Errors of Readers Dull of Comprehension Not to Be Ascribed to the Author.

Caput IV: What the Doctrine of the Catholic Faith is Concerning the Trinity.

Caput V: Of Difficulties Concerning the Trinity: in What Manner Three are One God, and How, Working Indivisibly, They Yet Perform Some Things Severally.

Caput VI: That the Son is Very God, of the Same Substance with the Father. Not Only the Father, But the Trinity, is Affirmed to Be Immortal. All Things are Not from the Father Alone, But Also from the Son. That the Holy Spirit is Very God, Equal with the Father and the Son.

Caput VII: In What Manner the Son is Less Than the Father, and Than Himself.

Caput VIII: The Texts of Scripture Explained Respecting the Subjection of the Son to the Father, Which Have Been Misunderstood. Christ Will Not So Give Up the Kingdom to the Father, as to Take It Away from Himself. The Beholding Him is the Promised End of All Actions. The Holy Spirit is Sufficient to Our Blessedness Equally with the Father.

Caput IX: All are Sometimes Understood in One Person.

Caput X: In What Manner Christ Shall Deliver Up the Kingdom to God, Even the Father. The Kingdom Having Been Delivered to God, Even the Father, Christ Will Not Then Make Intercession for Us.

Caput XI: By What Rule in the Scriptures It is Understood that the Son is Now Equal and Now Less.

Caput XII: In What Manner the Son is Said Not to Know the Day and the Hour Which the Father Knows. Some Things Said of Christ According to the Form of God, Other Things According to the Form of a Servant. In What Way It is of Christ to Give the Kingdom, in What Not of Christ. Christ Will Both Judge and Not Judge.

Caput XIII: Diverse Things are Spoken Concerning the Same Christ, on Account of the Diverse Natures of the One Hypostasis [Theanthropic Person]. Why It is Said that the Father Will Not Judge, But Has Given Judgment to the Son.

Book 2

Caput I: Preface

When men seek to know God, and bend their minds according to the capacity of human weakness to the understanding of the Trinity; learning, as they must, by experience, the wearisome difficulties of the task, whether from the sight itself of the mind striving to gaze upon light unapproachable, or, indeed, from the manifold and various modes of speech employed in the sacred writings (wherein, as it seems to me, the mind is nothing else but roughly exercised, in order that it may find sweetness when glorified by the grace of Christ);—such men, I say, when they have dispelled every ambiguity, and arrived at something certain, ought of all others most easily to make allowance for those who err in the investigation of so deep a secret. But there are two things most hard to bear with, in the case of those who are in error: hasty assumption before the truth is made plain; and, when it has been made plain, defence of the falsehood thus hastily assumed. From which two faults, inimical as they are to the finding out of the truth, and to the handling of the divine and sacred books, should God, as I pray and hope, defend and protect me with the shield of His good will, and with the grace of His mercy, I will not be slow to search out the substance of God, whether through His Scripture or through the creature. For both of these are set forth for our contemplation to this end, that He may Himself be sought, and Himself be loved, who inspired the one, and created the other. Nor shall I be afraid of giving my opinion, in which I shall more desire to be examined by the upright, than fear to be carped at by the perverse. For charity, most excellent and unassuming, gratefully accepts the dovelike eye; but for the dog’s tooth nothing remains, save either to shun it by the most cautious humility, or to blunt it by the most solid truth; and far rather would I be censured by any one whatsoever, than be praised by either the erring or the flatterer. For the lover of truth need fear no one’s censure. For he that censures, must needs be either enemy or friend. And if an enemy reviles, he must be borne with: but a friend, if he errs, must be taught; if he teaches, listened to. But if one who errs praises you, he confirms your error; if one who flatters, he seduces you into error. “Let the righteous,” therefore, “smite me, it shall be a kindness; and let him reprove me; but the oil of the sinner shall not anoint my head.”

Caput I: There is a Double Rule for Understanding the Scriptural Modes of Speech Concerning the Son of God. These Modes of Speech are of a Threefold Kind.

  1. Wherefore, although we hold most firmly, concerning our Lord Jesus Christ, what may be called the canonical rule, as it is both disseminated through the Scriptures, and has been demonstrated by learned and Catholic handlers of the same Scriptures, namely, that the Son of God is both understood to be equal to the Father according to the form of God in which He is, and less than the Father according to the form of a servant which He took; in which form He was found to be not only less than the Father, but also less than the Holy Spirit; and not only so, but less even than Himself,—not than Himself who was, but than Himself who is; because, by taking the form of a servant, He did not lose the form of God, as the testimonies of the Scriptures taught us, to which we have referred in the former book: yet there are some things in the sacred text so put as to leave it ambiguous to which rule they are rather to be referred; whether to that by which we understand the Son as less, in that He has taken upon Him the creature, or to that by which we understand that the Son is not indeed less than, but equal to the Father, but yet that He is from Him, God of God, Light of light. For we call the Son God of God; but the Father, God only; not of God. Whence it is plain that the Son has another of whom He is, and to whom He is Son; but that the Father has not a Son of whom He is, but only to whom He is father. For every son is what he is, of his father, and is son to his father; but no father is what he is, of his son, but is father to his son.

  2. Some things, then, are so put in the Scriptures concerning the Father and the Son, as to intimate the unity and equality of their substance; as, for instance, “I and the Father are one;” and, “Who, being in the form of God, thought it not robbery to be equal with God;” and whatever other texts there are of the kind. And some, again, are so put that they show the Son as less on account of the form of a servant, that is, of His having taken upon Him the creature of a changeable and human substance; as, for instance, that which says, “For my Father is greater than I;” and, “The Father judgeth no man, but hath committed all judgment unto the Son.” For a little after he goes on to say, “And hath given Him authority to execute judgment also, because He is the Son of man.” And further, some are so put, as to show Him at that time neither as less nor as equal, but only to intimate that He is of the Father; as, for instance, that which says, “For as the Father hath life in Himself, so hath He given to the Son to have life in Himself;” and that other: “The Son can do nothing of Himself, but what He seeth the Father do.” For if we shall take this to be therefore so said, because the Son is less in the form taken from the creature, it will follow that the Father must have walked on the water, or opened the eyes with clay and spittle of some other one born blind, and have done the other things which the Son appearing in the flesh did among men, before the Son did them; in order that He might be able to do those things, who said that the Son was not able to do anything of Himself, except what He hath seen the Father do. Yet who, even though he were mad, would think this? It remains, therefore, that these texts are so expressed, because the life of the Son is unchangeable as that of the Father is, and yet He is of the Father; and the working of the Father and of the Son is indivisible, and yet so to work is given to the Son from Him of whom He Himself is, that is, from the Father; and the Son so sees the Father, as that He is the Son in the very seeing Him. For to be of the Father, that is, to be born of the Father, is to Him nothing else than to see the Father; and to see Him working, is nothing else than to work with Him: but therefore not from Himself, because He is not from Himself. And, therefore, those things which “He sees the Father do, these also doeth the Son likewise,” because He is of the Father. For He neither does other things in like manner, as a painter paints other pictures, in the same way as he sees others to have been painted by another man; nor the same things in a different manner, as the body expresses the same letters, which the mind has thought; but “whatsoever things,” saith He, “the Father doeth, these same things also doeth the Son likewise.” He has said both “these same things,” and “likewise;” and hence the working of both the Father and the Son is indivisible and equal, but it is from the Father to the Son. Therefore the Son cannot do anything of Himself, except what He seeth the Father do. From this rule, then, whereby the Scriptures so speak as to mean, not to set forth one as less than another, but only to show which is of which, some have drawn this meaning, as if the Son were said to be less. And some among ourselves who are more unlearned and least instructed in these things, endeavoring to take these texts according to the form of a servant, and so misinterpreting them, are troubled. And to prevent this, the rule in question is to be observed whereby the Son is not less, but it is simply intimated that He is of the Father, in which words not His inequality but His birth is declared.

Caput II: That Some Ways of Speaking Concerning the Son are to Be Understood According to Either Rule.

  1. There are, then, some things in the sacred books, as I began by saying, so put, that it is doubtful to which they are to be referred: whether to that rule whereby the Son is less on account of His having taken the creature; or whether to that whereby it is intimated that although equal, yet He is of the Father. And in my opinion, if this is in such way doubtful, that which it really is can neither be explained nor discerned, then such passages may without danger be understood according to either rule, as that, for instance, “My doctrine is not mine, but His that sent me.” For this may both be taken according to the form of a servant, as we have already treated it in the former book; or according to the form of God, in which He is in such way equal to the Father, that He is yet of the Father. For according to the form of God, as the Son is not one and His life another, but the life itself is the Son; so the Son is not one and His doctrine another, but the doctrine itself is the Son. And hence, as the text, “He hath given life to the Son,” is no otherwise to be understood than, He hath begotten the Son, who is life; so also when it is said, He hath given doctrine to the Son, it may be rightly understood to mean, He hath begotten the Son, who is doctrine so that, when it is said, “My doctrine is not mine, but His who sent me,” it is so to be understood as if it were, I am not from myself, but from Him who sent me.

Caput III: Some Things Concerning the Holy Spirit are to Be Understood According to the One Rule Only.

  1. For even of the Holy Spirit, of whom it is not said, “He emptied Himself, and took upon Him the form of a servant;” yet the Lord Himself says, “Howbeit, when He the Spirit of Truth is come, He will guide you into all truth. For He shall not speak of Himself, but whatsoever He shall hear that shall He speak; and He will show you things to come. He shall glorify me; for He shall receive of mine, and shall show it unto you.” And except He had immediately gone on to say after this, “All things that the Father hath are mine; therefore said I, that He shall take of mine, and shall show it unto you;” it might, perhaps, have been believed that the Holy Spirit was so born of Christ, as Christ is of the Father. Since He had said of Himself, “My doctrine is not mine, but His that sent me;” but of the Holy Spirit, “For He shall not speak of Himself, but whatsoever he shall hear, that shall He speak;” and, “For He shall receive of mine, and shall show it unto you.” But because He has rendered the reason why He said, “He shall receive of mine” (for He says, “All things that the Father hath are mine; therefore said I, that He shall take of mine”); it remains that the Holy Spirit be understood to have of that which is the Father’s, as the Son also hath. And how can this be, unless according to that which we have said above, “But when the Comforter is come, whom I will send unto you from the Father, even the Spirit of truth which proceedeth from the Father, He shall testify of me”? He is said, therefore, not to speak of Himself, in that He proceedeth from the Father; and as it does not follow that the Son is less because He said, “The Son can do nothing of Himself, but what He seeth the Father do” (for He has not said this according to the form of a servant, but according to the form of God, as we have already shown, and these words do not set Him forth as less than, but as of the Father), so it is not brought to pass that the Holy Spirit is less, because it is said of Him, “For He shall not speak of Himself, but whatsoever He shall hear, that shall He speak;” for the words belong to Him as proceeding from the Father. But whereas both the Son is of the Father, and the Holy Spirit proceeds from the Father, why both are not called sons, and both not said to be begotten, but the former is called the one only-begotten Son, and the latter, viz. the Holy Spirit, neither son nor begotten, because if begotten, then certainly a son, we will discuss in another place, if God shall grant, and so far as He shall grant.

Caput IV: The Glorification of the Son by the Father Does Not Prove Inequality.

  1. But here also let them wake up if they can, who have thought this, too, to be a testimony on their side, to show that the Father is greater than the Son, because the Son hath said, “Father, glorify me.” Why, the Holy Spirit also glorifies Him. Pray, is the Spirit, too, greater than He? Moreover, if on that account the Holy Spirit glorifies the Son, because He shall receive of that which is the Son’s, and shall therefore receive of that which is the Son’s because all things that the Father has are the Son’s also; it is evident that when the Holy Spirit glorifies the Son, the Father glorifies the Son. Whence it may be perceived that all things that the Father hath are not only of the Son, but also of the Holy Spirit, because the Holy Spirit is able to glorify the Son, whom the Father glorifies. But if he who glorifies is greater than he whom he glorifies, let them allow that those are equal who mutually glorify each other. But it is written, also, that the Son glorifies the Father; for He says, “I have glorified Thee on the earth.” Truly let them beware lest the Holy Spirit be thought greater than both, because He glorifies the Son whom the Father glorifies, while it is not written that He Himself is glorified either by the Father or by the Son.

Caput V: The Son and Holy Spirit are Not Therefore Less Because Sent. The Son is Sent Also by Himself. Of the Sending of the Holy Spirit.

  1. But being proved wrong so far, men betake themselves to saying, that he who sends is greater than he who is sent: therefore the Father is greater than the Son, because the Son continually speaks of Himself as being sent by the Father; and the Father is also greater than the Holy Spirit, because Jesus has said of the Spirit, “Whom the Father will send in my name;” and the Holy Spirit is less than both, because both the Father sends Him, as we have said, and the Son, when He says, “But if I depart, I will send Him unto you.” I first ask, then, in this inquiry, whence and whither the Son was sent. “I,” He says, “came forth from the Father, and am come into the world.” Therefore, to be sent, is to come forth forth from the Father, and to come into the world. What, then, is that which the same evangelist says concerning Him, “He was in the world, and the world was made by Him, and the world knew Him not;” and then he adds, “He came unto His own?” Certainly He was sent thither, whither He came; but if He was sent into the world, because He came forth from the Father, then He both came into the world and was in the world. He was sent therefore thither, where He already was. For consider that, too, which is written in the prophet, that God said, “Do not I fill heaven and earth?” If this is said of the Son (for some will have it understood that the Son Himself spoke either by the prophets or in the prophets), whither was He sent except to the place where He already was? For He who says, “I fill heaven and earth,” was everywhere. But if it is said of the Father, where could He be without His own word and without His own wisdom, which “reacheth from one end to another mightily, and sweetly ordereth all things?” But He cannot be anywhere without His own Spirit. Therefore, if God is everywhere, His Spirit also is everywhere. Therefore, the Holy Spirit, too, was sent thither, where He already was. For he, too, who finds no place to which he might go from the presence of God, and who says, “If I ascend up into heaven, Thou art there; if I shall go down into hell, behold, Thou art there;” wishing it to be understood that God is present everywhere, named in the previous verse His Spirit; for He says,” Whither shall I go from Thy Spirit? or whither shall I flee from Thy presence?”

  2. For this reason, then, if both the Son and the Holy Spirit are sent thither where they were, we must inquire, how that sending, whether of the Son or of the Holy Spirit, is to be understood; for of the Father alone, we nowhere read that He is sent. Now, of the Son, the apostle writes thus: “But when the fullness of the time was come, God sent forth His Son, made of a woman, made under the law, to redeem them that were under the law.” “He sent,” he says, “His Son, made of a woman.” And by this term, woman, what Catholic does not know that he did not wish to signify the privation of virginity; but, according to a Hebraism, the difference of sex? When, therefore, he says, “God sent His Son, made of a woman,” he sufficiently shows that the Son was “sent” in this very way, in that He was “made of a woman.” Therefore, in that He was born of God, He was in the world; but in that He was born of Mary, He was sent and came into the world. Moreover, He could not be sent by the Father without the Holy Spirit, not only because the Father, when He sent Him, that is, when He made Him of a woman, is certainly understood not to have so made Him without His own Spirit; but also because it is most plainly and expressly said in the Gospel in answer to the Virgin Mary, when she asked of the angel, “How shall this be?” “The Holy Ghost shall come upon thee, and the power of the Highest shall overshadow thee.” And Matthew says, “She was found with child of the Holy Ghost.” Although, too, in the prophet Isaiah, Christ Himself is understood to say of His own future advent, “And now the Lord God and His Spirit hath sent me.”

  3. Perhaps some one may wish to drive us to say, that the Son is sent also by Himself, because the conception and childbirth of Mary is the working of the Trinity, by whose act of creating all things are created. And how, he will go on to say, has the Father sent Him, if He sent Himself? To whom I answer first, by asking him to tell me, if he can, in what manner the Father hath sanctified Him, if He hath sanctified Himself? For the same Lord says both; “Say ye of Him,” He says, “whom the Father hath sanctified and sent into the world, Thou blasphemest, because I said, I am the Son of God;” while in another place He says, “And for their sake I sanctify myself.” I ask, also, in what manner the Father delivered Him, if He delivered Himself? For the Apostle Paul says both: “Who,” he says, “spared not His own Son, but delivered Him up for us all;” while elsewhere he says of the Saviour Himself, “Who loved me, and delivered Himself for me.” He will reply, I suppose, if he has a right sense in these things, Because the will of the Father and the Son is one, and their working indivisible. In like manner, then, let him understand the incarnation and nativity of the Virgin, wherein the Son is understood as sent, to have been wrought by one and the same operation of the Father and of the Son indivisibly; the Holy Spirit certainly not being thence excluded, of whom it is expressly said, “She was found with child by the Holy Ghost.” For perhaps our meaning will be more plainly unfolded, if we ask in what manner God sent His Son. He commanded that He should come, and He, complying with the commandment, came. Did He then request, or did He only suggest? But whichever of these it was, certainly it was done by a word, and the Word of God is the Son of God Himself. Wherefore, since the Father sent Him by a word, His being sent was the work of both the Father and His Word; therefore the same Son was sent by the Father and the Son, because the Son Himself is the Word of the Father. For who would embrace so impious an opinion as to think the Father to have uttered a word in time, in order that the eternal Son might thereby be sent and might appear in the flesh in the fullness of time? But assuredly it was in that Word of God itself which was in the beginning with God and was God, namely, in the wisdom itself of God, apart from time, at what time that wisdom must needs appear in the flesh. Therefore, since without any commencement of time, the Word was in the beginning, and the Word was with God, and the Word was God, it was in the Word itself without any time, at what time the Word was to be made flesh and dwell among us. And when this fullness of time had come, “God sent His Son, made of a woman,” that is, made in time, that the Incarnate Word might appear to men; while it was in that Word Himself, apart from time, at what time this was to be done; for the order of times is in the eternal wisdom of God without time. Since, then, that the Son should appear in the flesh was wrought by both the Father and the Son, it is fitly said that He who appeared in that flesh was sent, and that He who did not appear in it, sent Him; because those things which are transacted outwardly before the bodily eyes have their existence from the inward structure (apparatu) of the spiritual nature, and on that account are fitly said to be sent. Further, that form of man which He took is the person of the Son, not also of the Father; on which account the invisible Father, together with the Son, who with the Father is invisible, is said to have sent the same Son by making Him visible. But if He became visible in such way as to cease to be invisible with the Father, that is, if the substance of the invisible Word were turned by a change and transition into a visible creature, then the Son would be so understood to be sent by the Father, that He would be found to be only sent; not also, with the Father, sending. But since He so took the form of a servant, as that the unchangeable form of God remained, it is clear that that which became apparent in the Son was done by the Father and the Son not being apparent; that is, that by the invisible Father, with the invisible Son, the same Son Himself was sent so as to be visible. Why, therefore, does He say, “Neither came I of myself?” This, we may now say, is said according to the form of a servant, in the same way as it is said, “I judge no man.”

  4. If, therefore, He is said to be sent, in so far as He appeared outwardly in the bodily creature, who inwardly in His spiritual nature is always hidden from the eyes of mortals, it is now easy to understand also of the Holy Spirit why He too is said to be sent. For in due time a certain outward appearance of the creature was wrought, wherein the Holy Spirit might be visibly shown; whether when He descended upon the Lord Himself in a bodily shape as a dove, or when, ten days having past since His ascension, on the day of Pentecost a sound came suddenly from heaven as of a rushing mighty wind, and cloven tongues like as of fire were seen upon them, and it sat upon each of them. This operation, visibly exhibited, and presented to mortal eyes, is called the sending of the Holy Spirit; not that His very substance appeared, in which He himself also is invisible and unchangeable, like the Father and the Son, but that the hearts of men, touched by things seen outwardly, might be turned from the manifestation in time of Him as coming to His hidden eternity as ever present.

Caput VI: The Creature is Not So Taken by the Holy Spirit as Flesh is by the Word.

  1. It is, then, for this reason nowhere written, that the Father is greater than the Holy Spirit, or that the Holy Spirit is less than God the Father, because the creature in which the Holy Spirit was to appear was not taken in the same way as the Son of man was taken, as the form in which the person of the Word of God Himself should be set forth not that He might possess the word of God, as other holy and wise men have possessed it, but “above His fellows;” not certainly that He possessed the word more than they, so as to be of more surpassing wisdom than the rest were, but that He was the very Word Himself. For the word in the flesh is one thing, and the Word made flesh is another; i.e. the word in man is one thing, the Word that is man is another. For flesh is put for man, where it is said, “The Word was made flesh;” and again, “And all flesh shall see the salvation of God.” For it does not mean flesh without soul and without mind; but “all flesh,” is the same as if it were said, every man. The creature, then, in which the Holy Spirit should appear, was not so taken, as that flesh and human form were taken, of the Virgin Mary. For the Spirit did not beatify the dove, or the wind, or the fire, and join them for ever to Himself and to His person in unity and “fashion.” Nor, again, is the nature of the Holy Spirit mutable and changeable; so that these things were not made of the creature, but He himself was turned and changed first into one and then into another, as water is changed into ice. But these things appeared at the seasons at which they ought to have appeared, the creature serving the Creator, and being changed and converted at the command of Him who remains immutably in Himself, in order to signify and manifest Him in such way as it was fit He should be signified and manifested to mortal men. Accordingly, although that dove is called the Spirit; and in speaking of that fire, “There appeared unto them,” he says, “cloven tongues, like as of fire, and it sat upon each of them; and they began to speak with other tongues, as the Spirit gave them utterance; in order to show that the Spirit was manifested by that fire, as by the dove; yet we cannot call the Holy Spirit both God and a dove, or both God and fire, in the same way as we call the Son both God and man; nor as we call the Son the Lamb of God; which not only John the Baptist says, “Behold the Lamb of God,” but also John the Evangelist sees the Lamb slain in the Apocalypse. For that prophetic vision was not shown to bodily eyes through bodily forms, but in the spirit through spiritual images of bodily things. But whosoever saw that dove and that fire, saw them with their eyes. Although it may perhaps be disputed concerning the fire, whether it was seen by the eyes or in the spirit, on account of the form of the sentence. For the text does not say, They saw cloven tongues like fire, but, “There appeared to them.” But we are not wont to say with the same meaning, It appeared to me; as we say, I saw. And in those spiritual visions of corporeal images the usual expressions are, both, It appeared to me; and, I saw: but in those things which are shown to the eyes through express corporeal forms, the common expression is not, It appeared to me; but, I saw. There may, therefore, be a question raised respecting that fire, how it was seen; whether within in the spirit as it were outwardly, or really outwardly before the eyes of the flesh. But of that dove, which is said to have descended in a bodily form, no one ever doubted that it was seen by the eyes. Nor, again, as we call the Son a Rock (for it is written, “And that Rock was Christ”), can we so call the Spirit a dove or fire. For that rock was a thing already created, and after the mode of its action was called by the name of Christ, whom it signified; like the stone placed under Jacob’s head, and also anointed, which he took in order to signify the Lord; or as Isaac was Christ, when he carried the wood for the sacrifice of himself. A particular significative action was added to those already existing things; they did not, as that dove and fire, suddenly come into being in order simply so to signify. The dove and the fire, indeed, seem to me more like that flame which appeared to Moses in the bush, or that pillar which the people followed in the wilderness, or the thunders and lightnings which came when the Law was given in the mount. For the corporeal form of these things came into being for the very purpose, that it might signify something, and then pass away.

Caput VII: A Doubt Raised About Divine Appearances.

  1. The Holy Spirit, then, is also said to be sent, on account of these corporeal forms which came into existence in time, in order to signify and manifest Him, as He must needs be manifested, to human senses; yet He is not said to be less than the Father, as the Son, because He was in the form of a servant, is said to be; because that form of a servant inhered in the unity of the person of the Son, but those corporeal forms appeared for a time, in order to show what was necessary to be shown, and then ceased to be. Why, then, is not the Father also said to be sent, through those corporeal forms, the fire of the bush, and the pillar of cloud or of fire, and the lightnings in the mount, and whatever other things of the kind appeared at that time, when (as we have learned from Scripture testimony) He spake face to face with the fathers, if He Himself was manifested by those modes and forms of the creature, as exhibited and presented corporeally to human sight? But if the Son was manifested by them, why is He said to be sent so long after, when He was made of a woman, as the apostle says, “But when the fullness of time was come, God sent forth His Son, made of a woman,” seeing that He was sent also before, when He appeared to the fathers by those changeable forms of the creature? Or if He cannot rightly be said to be sent, unless when the Word was made flesh, why is the Holy Spirit said to be sent, of whom no such incarnation was ever wrought? But if by those visible things, which are put before us in the Law and in the prophets, neither the Father nor the Son but the Holy Spirit was manifested, why also is He said to be sent now, when He was sent also before after these modes?

  2. In the perplexity of this inquiry, the Lord helping us, we must ask, first, whether the Father, or the Son, or the Holy Spirit; or whether, sometimes the Father, sometimes the Son, sometimes the Holy Spirit; or whether it was without any distinction of persons, in such way as the one and only God is spoken of, that is, that the Trinity itself appeared to the Fathers by those forms of the creature. Next, whichever of these alternatives shall have been found or thought true, whether for this purpose only the creature was fashioned, wherein God, as He judged it suitable at that time, should be shown to human sight; or whether angels, who already existed, were so sent, as to speak in the person of God, taking a corporeal form from the corporeal creature, for the purpose of their ministry, as each had need; or else, according to the power the Creator has given them, changing and converting their own body itself, to which they are not subject, but govern it as subject to themselves, into whatever appearances they would that were suited and apt to their several actions. Lastly, we shall discern that which it was our purpose to ask, viz. whether the Son and the Holy Spirit were also sent before; and, if they were so sent, what difference there is between that sending, and the one which we read of in the Gospel; or whether in truth neither of them were sent, except when either the Son was made of the Virgin Mary, or the Holy Spirit appeared in a visible form, whether in the dove or in tongues of fire.

Caput VIII: The Entire Trinity Invisible.

  1. Let us therefore say nothing of those who, with an over carnal mind, have thought the nature of the Word of God, and the Wisdom, which, “remaining in herself, maketh all things new,” whom we call the only Son of God, not only to be changeable, but also to be visible. For these, with more audacity than religion, bring a very dull heart to the inquiry into divine things. For whereas the soul is a spiritual substance, and whereas itself also was made, yet could not be made by any other than by Him by whom all things were made, and without whom nothing is made, it, although changeable, is yet not visible; and this they have believed to be the case with the Word Himself and with the Wisdom of God itself, by which the soul was made; whereas this Wisdom is not only invisible, as the soul also is, but likewise unchangeable, which the soul is not. It is in truth the same unchangeableness in it, which is referred to when it was said, “Remaining in herself she maketh all things new.” Yet these people, endeavoring, as it were, to prop up their error in its fall by testimonies of the divine Scriptures, adduce the words of the Apostle Paul; and take that, which is said of the one only God, in whom the Trinity itself is understood, to be said only of the Father, and neither of the Son nor of the Holy Spirit: “Now unto the King eternal, immortal, invisible, the only wise God, be honor and glory for ever and ever;” and that other passage, “The blessed and only Potentate, the King of kings, and Lord of lords; who only hath immortality, dwelling in the light which no man can approach unto; whom no man hath seen, nor can see.” How these passages are to be understood, I think we have already discoursed sufficiently.

Caput IX: Against Those Who Believed the Father Only to Be Immortal and Invisible. The Truth to Be Sought by Peaceful Study.

  1. But they who will have these texts understood only of the Father, and not of the Son or the Holy Spirit, declare the Son to be visible, not by having taken flesh of the Virgin, but aforetime also in Himself. For He Himself, they say, appeared to the eyes of the Fathers. And if you say to them, In whatever manner, then, the Son is visible in Himself, in that manner also He is mortal in Himself; so that it plainly follows that you would have this saying also understood only of the Father, viz., “Who only hath immortality;” for if the Son is mortal from having taken upon Him our flesh, then allow that it is on account of this flesh that He is also visible: they reply, that it is not on account of this flesh that they say that the Son is mortal; but that, just as He was also before visible, so He was also before mortal. For if they say the Son is mortal from having taken our flesh, then it is not the Father alone without the Son who hath immortality; because His Word also has immortality, by which all things were made. For He did not therefore lose His immortality, because He took mortal flesh; seeing that it could not happen even to the human soul, that it should die with the body, when the Lord Himself says, “Fear not them which kill the body, but are not able to kill the soul.” Or, forsooth, also the Holy Spirit took flesh: concerning whom certainly they will, without doubt, be troubled to say—if the Son is mortal on account of taking our flesh—in what manner they understand that the Father only has immortality without the Son and the Holy Spirit, since, indeed, the Holy Spirit did not take our flesh; and if He has not immortality, then the Son is not mortal on account of taking our flesh; but if the Holy Spirit has immortality, then it is not said only of the Father, “Who only hath immortality.” And therefore they think they are able to prove that the Son in Himself was mortal also before the incarnation, because changeableness itself is not unfitly called mortality, according to which the soul also is said to die; not because it is changed and turned into body, or into some substance other than itself, but because, whatever in its own selfsame substance is now after another mode than it once was, is discovered to be mortal, in so far as it has ceased to be what it was. Because then, say they, before the Son of God was born of the Virgin Mary, He Himself appeared to our fathers, not in one and the same form only, but in many forms; first in one form, then in another; He is both visible in Himself, because His substance was visible to mortal eyes, when He had not yet taken our flesh, and mortal, inasmuch as He is changeable. And so also the Holy Spirit, who appeared at one time as a dove, and another time as fire. Whence, they say, the following texts do not belong to the Trinity, but singularly and properly to the Father only: “Now unto the King eternal, immortal, and invisible, the only wise God;” and, “Who only hath immortality, dwelling in the light which no man can approach unto; whom no man hath seen, nor can see.”

  2. Passing by, then, these reasoners, who are unable to know the substance even of the soul, which is invisible, and therefore are very far indeed from knowing that the substance of the one and only God, that is, the Father and the Son and the Holy Spirit, remains ever not only invisible, but also unchangeable, and that hence it possesses true and real immortality; let us, who deny that God, whether the Father, or the Son, or the Holy Spirit, ever appeared to bodily eyes, unless through the corporeal creature made subject to His own power; let us, I say—ready to be corrected, if we are reproved in a fraternal and upright spirit, ready to be so, even if carped at by an enemy, so that he speak the truth—in catholic peace and with peaceful study inquire, whether God indiscriminately appeared to our fathers before Christ came in the flesh, or whether it was any one person of the Trinity, or whether severally, as it were by turns.

Caput X: Whether God the Trinity Indiscriminately Appeared to the Fathers, or Any One Person of the Trinity. The Appearing of God to Adam. Of the Same Appearance. The Vision to Abraham.

  1. And first, in that which is written in Genesis, viz., that God spake with man whom He had formed out of the dust; if we set apart the figurative meaning, and treat it so as to place faith in the narrative even in the letter, it should appear that God then spake with man in the appearance of a man. This is not indeed expressly laid down in the book, but the general tenor of its reading sounds in this sense, especially in that which is written, that Adam heard the voice of the Lord God, walking in the garden in the cool of the evening, and hid himself among the trees of the garden; and when God said, “Adam, where art thou?” replied, “I heard Thy voice, and I was afraid because I was naked, and I hid myself from Thy face.” For I do not see how such a walking and conversation of God can be understood literally, except He appeared as a man. For it can neither be said that a voice only of God was framed, when God is said to have walked, or that He who was walking in a place was not visible; while Adam, too, says that he hid himself from the face of God. Who then was He? Whether the Father, or the Son, or the Holy Spirit? Whether altogether indiscriminately did God the Trinity Himself speak to man in the form of man? The context, indeed, itself of the Scripture nowhere, it should seem, indicates a change from person to person; but He seems still to speak to the first man, who said, “Let there be light,” and, “Let there be a firmament,” and so on through each of those days; whom we usually take to be God the Father, making by a word whatever He willed to make. For He made all things by His word, which Word we know, by the right rule of faith, to be His only Son. If, therefore, God the Father spake to the first man, and Himself was walking in the garden in the cool of the evening, and if it was from His face that the sinner hid himself amongst the trees of the garden, why are we not to go on to understand that it was He also who appeared to Abraham and to Moses, and to whom He would, and how He would, through the changeable and visible creature, subjected to Himself, while He Himself remains in Himself and in His own substance, in which He is unchangeable and invisible? But, possibly, it might be that the Scripture passed over in a hidden way from person to person, and while it had related that the Father said “Let there be light,” and the rest which it mentioned Him to have done by the Word, went on to indicate the Son as speaking to the first man; not unfolding this openly, but intimating it to be understood by those who could understand it.

  2. Let him, then, who has the strength whereby he can penetrate this secret with his mind’s eye, so that to him it appears clearly, either that the Father also is able, or that only the Son and Holy Spirit are able, to appear to human eyes through a visible creature; let him, I say, proceed to examine these things if he can, or even to express and handle them in words; but the thing itself, so far as concerns this testimony of Scripture, where God spake with man, is, in my judgment, not discoverable, because it does not evidently appear even whether Adam usually saw God with the eyes of his body; especially as it is a great question what manner of eyes it was that were opened when they tasted the forbidden fruit; for before they had tasted, these eyes were closed. Yet I would not rashly assert, even if that scripture implies Paradise to have been a material place, that God could not have walked there in any way except in some bodily form. For it might be said, that only words were framed for the man to hear, without seeing any form. Neither, because it is written, “Adam hid himself from the face of God,” does it follow forthwith that he usually saw His face. For what if he himself indeed could not see, but feared to be himself seen by Him whose voice he had heard, and had felt His presence as he walked? For Cain, too, said to God, “From Thy face I will hide myself;” yet we are not therefore compelled to admit that he was wont to behold the face of God with his bodily eyes in any visible form, although he had heard the voice of God questioning and speaking with him of his sin. But what manner of speech it was that God then uttered to the outward ears of men, especially in speaking to the first man, it is both difficult to discover, and we have not undertaken to say in this discourse. But if words alone and sounds were wrought, by which to bring about some sensible presence of God to those first men, I do not know why I should not there understand the person of God the Father, seeing that His person is manifested also in that voice, when Jesus appeared in glory on the mount before the three disciples; and in that when the dove descended upon Him at His baptism; and in that where He cried to the Father concerning His own glorification and it was answered Him, “I have both glorified, and will glorify again.” Not that the voice could be wrought without the work of the Son and of the Holy Spirit (since the Trinity works indivisibly), but that such a voice was wrought as to manifest the person of the Father only; just as the Trinity wrought that human form from the Virgin Mary, yet it is the person of the Son alone; for the invisible Trinity wrought the visible person of the Son alone. Neither does anything forbid us, not only to understand those words spoken to Adam as spoken by the Trinity, but also to take them as manifesting the person of that Trinity. For we are compelled to understand of the Father only, that which is said, “This is my beloved Son.” For Jesus can neither be believed nor understood to be the Son of the Holy Spirit, or even His own Son. And where the voice uttered, “I have both glorified, and will glorify again,” we confess it was only the person of the Father; since it is the answer to that word of the Lord, in which He had said, “Father, glorify thy Son,” which He could not say except to God the Father only, and not also to the Holy Spirit, whose Son He was not. But here, where it is written, “And the Lord God said to Adam,” no reason can be given why the Trinity itself should not be understood.

  3. Likewise, also, in that which is written, “Now the Lord had said unto Abraham, Get thee out of thy country, and from thy kindred, and thy father’s house,” it is not clear whether a voice alone came to the ears of Abraham, or whether anything also appeared to his eyes. But a little while after, it is somewhat more clearly said, “And the Lord appeared unto Abraham, and said, Unto thy seed will I give this land.” But neither there is it expressly said in what form God appeared to him, or whether the Father, or the Son, or the Holy Spirit appeared to him. Unless, perhaps, they think that it was the Son who appeared to Abraham, because it is not written, God appeared to him, but “the Lord appeared to him.” For the Son seems to be called the Lord as though the name was appropriated to Him; as e.g. the apostle says, “For though there be that are called gods, whether in heaven or in earth, (as there be gods many and lords many,) but to us there is but one God, the Father, of whom are all things, and we in Him; and one Lord Jesus Christ, by whom are all things, and we by Him.” But since it is found that God the Father also is called Lord in many places,—for instance, “The Lord hath said unto me, Thou art my Son; this day have I begotten Thee;” and again, “The Lord said unto my Lord, Sit Thou at my right hand;” since also the Holy Spirit is found to be called Lord, as where the apostle says, “Now the Lord is that Spirit;” and then, lest any one should think the Son to be signified, and to be called the Spirit on account of His incorporeal substance, has gone on to say, “And where the Spirit of the Lord is, there is liberty;” and no one ever doubted the Spirit of the Lord to be the Holy Spirit: therefore, neither here does it appear plainly whether it was any person of the Trinity that appeared to Abraham, or God Himself the Trinity, of which one God it is said, “Thou shalt fear the Lord thy God, and Him only shall thou serve.” But under the oak at Mamre he saw three men, whom he invited, and hospitably received, and ministered to them as they feasted. Yet Scripture at the beginning of that narrative does not say, three men appeared to him, but, “The Lord appeared to him.” And then, setting forth in due order after what manner the Lord appeared to him, it has added the account of the three men, whom Abraham invites to his hospitality in the plural number, and afterwards speaks to them in the singular number as one; and as one He promises him a son by Sara, viz. the one whom the Scripture calls Lord, as in the beginning of the same narrative, “The Lord,” it says, “appeared to Abraham.” He invites them then, and washes their feet, and leads them forth at their departure, as though they were men; but he speaks as with the Lord God, whether when a son is promised to him, or when the destruction is shown to him that was impending over Sodom.

Caput XI: Of the Same Appearance.

Caput XII: The Appearance to Lot is Examined.

Caput XIII: The Appearance in the Bush.

Caput XIV: Of the Appearance in the Pillar of Cloud and of Fire.

Caput XV: Of the Appearance on Sinai. Whether the Trinity Spake in that Appearance or Some One Person Specially.

Caput XVI: In What Manner Moses Saw God.

Caput XVII: How the Back Parts of God Were Seen. The Faith of the Resurrection of Christ. The Catholic Church Only is the Place from Whence the Back Parts of God are Seen. The Back Parts of God Were Seen by the Israelites. It is a Rash Opinion to Think that God the Father Only Was Never Seen by the Fathers.

Caput XVIII: The Vision of Daniel.

Book 3

Caput I: Preface

Caput I: What is to Be Said Thereupon.

Caput II: The Will of God is the Higher Cause of All Corporeal Change. This is Shown by an Example.

Caput III: Of the Same Argument.

Caput IV: God Uses All Creatures as He Will, and Makes Visible Things for the Manifestation of Himself.

Caput V: Why Miracles are Not Usual Works.

Caput VI: Diversity Alone Makes a Miracle.

Caput VII: Great Miracles Wrought by Magic Arts.

Caput VIII: God Alone Creates Those Things Which are Changed by Magic Art.

Caput IX: The Original Cause of All Things is from God.

Caput X: In How Many Ways the Creature is to Be Taken by Way of Sign. The Eucharist.

Caput XI: The Essence of God Never Appeared in Itself. Divine Appearances to the Fathers Wrought by the Ministry of Angels. An Objection Drawn from the Mode of Speech Removed. That the Appearing of God to Abraham Himself, Just as that to Moses, Was Wrought by Angels. The Same Thing is Proved by the Law Being Given to Moses by Angels. What Has Been Said in This Book, and What Remains to Be Said in the Next.

Book 4

Caput I: Preface

Caput I: We are Made Perfect by Acknowledgement of Our Own Weakness. The Incarnate Word Dispels Our Darkness.

Caput II: How We are Rendered Apt for the Perception of Truth Through the Incarnate Word.

Caput III: The One Death and Resurrection of The Body of Christ Harmonizes with Our Double Death and Resurrection of Body and Soul, to the Effect of Salvation. In What Way the Single Death of Christ is Bestowed Upon Our Double Death.

Caput IV: The Ratio of the Single to the Double Comes from the Perfection of the Senary Number. The Perfection of The Senary Number is Commended in the Scriptures. The Year Abounds in The Senary Number.

Caput V: The Number Six is Also Commended in the Building Up of the Body of Christ and of the Temple at Jerusalem.

Caput VI: The Three Days of the Resurrection, in Which Also the Ratio of Single to Double is Apparent.

Caput VII: In What Manner We are Gathered from Many into One Through One Mediator.

Caput VIII: In What Manner Christ Wills that All Shall Be One in Himself.

Caput IX: The Same Argument Continued.

Caput X: As Christ is the Mediator of Life, So the Devil is the Mediator of Death.

Caput XI: Miracles Which are Done by Demons are to Be Spurned.

Caput XII: The Devil the Mediator of Death, Christ of Life.

Caput XIII: The Death of Christ Voluntary. How the Mediator of Life Subdued the Mediator of Death. How the Devil Leads His Own to Despise the Death of Christ.

Caput XIV: Christ the Most Perfect Victim for Cleansing Our Faults. In Every Sacrifice Four Things are to Be Considered.

Caput XV: They are Proud Who Think They are Able, by Their Own Righteousness, to Be Cleansed So as to See God.

Caput XVI: The Old Philosophers are Not to Be Consulted Concerning the Resurrection and Concerning Things to Come.

Caput XVII: In How Many Ways Things Future are Foreknown. Neither Philosophers, Nor Those Who Were Distinguished Among the Ancients, are to Be Consulted Concerning the Resurrection of the Dead.

Caput XVIII: The Son of God Became Incarnate in Order that We Being Cleansed by Faith May Be Raised to the Unchangeable Truth.

Caput XIX: In What Manner the Son Was Sent and Proclaimed Beforehand. How in the Sending of His Birth in the Flesh He Was Made Less Without Detriment to His Equality with the Father.

Caput XX: The Sender and the Sent Equal. Why the Son is Said to Be Sent by the Father. Of the Mission of the Holy Spirit. How and by Whom He Was Sent. The Father the Beginning of the Whole Godhead.

Caput XXI: Of the Sensible Showing of the Holy Spirit, and of the Coeternity of the Trinity. What Has Been Said, and What Remains to Be Said.

Book 5

Caput I: What the Author Entreats from God, What from the Reader. In God Nothing is to Be Thought Corporeal or Changeable.

Caput II: God the Only Unchangeable Essence.

Caput III: The Argument of the Arians is Refuted, Which is Drawn from the Words Begotten and Unbegotten.

Caput IV: The Accidental Always Implies Some Change in the Thing.

Caput V: Nothing is Spoken of God According to Accident, But According to Substance or According to Relation.

Caput VI: Reply is Made to the Cavils of the Heretics in Respect to the Same Words Begotten and Unbegotten.

Caput VII: The Addition of a Negative Does Not Change the Predicament.

Caput VIII: Whatever is Spoken of God According to Substance, is Spoken of Each Person Severally, and Together of the Trinity Itself. One Essence in God, and Three, in Greek, Hypostases, in Latin, Persons.

Caput IX: The Three Persons Not Properly So Called [in a Human Sense].

Caput X: Those Things Which Belong Absolutely to God as an Essence, are Spoken of the Trinity in the Singular, Not in the Plural.

Caput XI: What is Said Relatively in the Trinity.

Caput XII: In Relative Things that are Reciprocal, Names are Sometimes Wanting.

Caput XIII: How the Word Beginning (Principium) is Spoken Relatively in the Trinity.

Caput XIV: The Father and the Son the Only Beginning (Principium) of the Holy Spirit.

Caput XV: Whether the Holy Spirit Was a Gift Before as Well as After He Was Given.

Caput XVI: What is Said of God in Time, is Said Relatively, Not Accidentally.

Book 6

Caput I: The Son, According to the Apostle, is the Power and Wisdom of the Father. Hence the Reasoning of the Catholics Against the Earlier Arians. A Difficulty is Raised, Whether the Father is Not Wisdom Himself, But Only the Father of Wisdom.

Caput II: What is Said of the Father and Son Together, and What Not.

Caput III: That the Unity of the Essence of the Father and the Son is to Be Gathered from the Words, ‘We are One.’ The Son is Equal to the Father Both in Wisdom and in All Other Things.

Caput IV: The Same Argument Continued.

Caput V: The Holy Spirit Also is Equal to the Father and the Son in All Things.

Caput VI: How God is a Substance Both Simple and Manifold.

Caput VII: God is a Trinity, But Not Triple (Triplex).

Caput VIII: No Addition Can Be Made to the Nature of God.

Caput IX: Whether One or the Three Persons Together are Called the Only God.

Caput X: Of the Attributes Assigned by Hilary to Each Person. The Trinity is Represented in Things that are Made.

Book 7

Caput I: Augustin Returns to the Question, Whether Each Person of the Trinity by Itself is Wisdom. With What Difficulty, or in What Way, the Proposed Question is to Be Solved.

Caput II: The Father and the Son are Together One Wisdom, as One Essence, Although Not Together One Word.

Caput III: Why the Son Chiefly is Intimated in the Scriptures by the Name of Wisdom, While Both the Father and the Holy Spirit are Wisdom. That the Holy Spirit, Together with the Father and the Son, is One Wisdom.

Caput IV: How It Was Brought About that the Greeks Speak of Three Hypostases, the Latins of Three Persons. Scripture Nowhere Speaks of Three Persons in One God.

Caput V: In God, Substance is Spoken Improperly, Essence Properly.

Caput VI: Why We Do Not in the Trinity Speak of One Person, and Three Essences. What He Ought to Believe Concerning the Trinity Who Does Not Receive What is Said Above. Man is Both After the Image, and is the Image of God.

Book 8

Caput I: Preface.—The Conclusion of What Has Been Said Above. The Rule to Be Observed in the More Difficult Questions of the Faith.

Caput I: It is Shown by Reason that in God Three are Not Anything Greater Than One Person.

Caput II: Every Corporeal Conception Must Be Rejected, in Order that It May Be Understood How God is Truth.

Caput III: How God May Be Known to Be the Chief Good. The Mind Does Not Become Good Unless by Turning to God.

Caput IV: God Must First Be Known by an Unerring Faith, that He May Be Loved.

Caput V: How the Trinity May Be Loved Though Unknown.

Caput VI: How the Man Not Yet Righteous Can Know the Righteous Man Whom He Loves.

Caput VII: Of True Love, by Which We Arrive at the Knowledge of the Trinity. God is to Be Sought, Not Outwardly, by Seeking to Do Wonderful Things with the Angels, But Inwardly, by Imitating the Piety of Good Angels.

Caput VIII: That He Who Loves His Brother, Loves God; Because He Loves Love Itself, Which is of God, and is God.

Caput IX: Our Love of the Righteous is Kindled from Love Itself of the Unchangeable Form of Righteousness.

Caput X: There are Three Things in Love, as It Were a Trace of the Trinity.

Book 9

Caput I: In What Way We Must Inquire Concerning the Trinity.

Caput II: The Three Things Which are Found in Love Must Be Considered.

Caput III: The Image of the Trinity in the Mind of Man Who Knows Himself and Loves Himself. The Mind Knows Itself Through Itself.

Caput IV: The Three are One, and Also Equal, Viz. The Mind Itself, and the Love, and the Knowledge of It. That the Same Three Exist Substantially, and are Predicated Relatively. That the Same Three are Inseparable. That the Same Three are Not Joined and Commingled Like Parts, But that They are of One Essence, and are Relatives.

Caput V: That These Three are Several in Themselves, and Mutually All in All.

Caput VI: There is One Knowledge of the Thing in the Thing Itself, and Another in Eternal Truth Itself. That Corporeal Things, Too, are to Be Judged the Rules of Eternal Truth.

Caput VII: We Conceive and Beget the Word Within, from the Things We Have Beheld in the Eternal Truth. The Word, Whether of the Creature or of the Creator, is Conceived by Love.

Caput VIII: In What Desire and Love Differ.

Caput IX: In the Love of Spiritual Things the Word Born is the Same as the Word Conceived. It is Otherwise in the Love of Carnal Things.

Caput X: Whether Only Knowledge that is Loved is the Word of the Mind.

Caput XI: That the Image or Begotten Word of the Mind that Knows Itself is Equal to the Mind Itself.

Caput XII: Why Love is Not the Offspring of the Mind, as Knowledge is So. The Solution of the Question. The Mind with the Knowledge of Itself and the Love of Itself is the Image of the Trinity.

Book 10

Caput I: The Love of the Studious Mind, that Is, of One Desirous to Know, is Not the Love of a Thing Which It Does Not Know.

Caput II: No One at All Loves Things Unknown.

Caput III: That When the Mind Loves Itself, It is Not Unknown to Itself.

Caput IV: How the Mind Knows Itself, Not in Part, But as a Whole.

Caput V: Why the Soul is Enjoined to Know Itself. Whence Come the Errors of the Mind Concerning Its Own Substance.

Caput VI: The Opinion Which the Mind Has of Itself is Deceitful.

Caput VII: The Opinions of Philosophers Respecting the Substance of the Soul. The Error of Those Who are of Opinion that the Soul is Corporeal, Does Not Arise from Defective Knowledge of the Soul, But from Their Adding There to Something Foreign to It. What is Meant by Finding.

Caput VIII: How the Soul Inquires into Itself. Whence Comes the Error of the Soul Concerning Itself.

Caput IX: The Mind Knows Itself, by the Very Act of Understanding the Precept to Know Itself.

Caput X: Every Mind Knows Certainly Three Things Concerning Itself—That It Understands, that It Is, and that It Lives.

Caput XI: In Memory, Understanding [or Intelligence], and Will, We Have to Note Ability, Learning, and Use. Memory, Understanding, and Will are One Essentially, and Three Relatively.

Caput XII: The Mind is an Image of the Trinity in Its Own Memory, and Understanding, and Will.

Book 11

Caput I: A Trace of the Trinity Also In the Outer Man.

Caput II: A Certain Trinity in the Sight. That There are Three Things in Sight, Which Differ in Their Own Nature. In What Manner from a Visible Thing Vision is Produced, or the Image of that Thing Which is Seen. The Matter is Shown More Clearly by an Example. How These Three Combine in One.

Caput III: The Unity of the Three Takes Place in Thought, Viz. Of Memory, of Ternal Vision, and of Will Combining Both.

Caput IV: How This Unity Comes to Pass.

Caput V: The Trinity of the Outer Man, or of External Vision, is Not an Image of God. The Likeness of God is Desired Even in Sins. In External Vision the Form of the Corporeal Thing is as It Were the Parent, Vision the Offspring; But the Will that Unites These Suggests the Holy Spirit.

Caput VI: Of What Kind We are to Reckon the Rest (Requies), and End (Finis), of the Will in Vision.

Caput VII: There is Another Trinity in the Memory of Him Who Thinks Over Again What He Has Seen.

Caput VIII: Different Modes of Conceiving.

Caput IX: Species is Produced by Species in Succession.

Caput X: The Imagination Also Adds Even to Things We Have Not Seen, Those Things Which We Have Seen Elsewhere.

Caput XI: Number, Weight, Measure.

Book 12

Caput I: Of What Kind are the Outer and the Inner Man.

Caput II: Man Alone of Animate Creatures Perceives the Eternal Reasons of Things Pertaining to the Body.

Caput III: The Higher Reason Which Belongs to Contemplation, and the Lower Which Belongs to Action, are in One Mind.

Caput IV: The Trinity and the Image of God is in that Part of the Mind Alone Which Belongs to the Contemplation of Eternal Things.

Caput V: The Opinion Which Devises an Image of the Trinity in the Marriage of Male and Female, and in Their Offspring.

Caput VI: Why This Opinion is to Be Rejected.

Caput VII: How Man is the Image of God. Whether the Woman is Not Also the Image of God. How the Saying of the Apostle, that the Man is the Image of God, But the Woman is the Glory of the Man, is to Be Understood Figuratively and Mystically.

Caput VIII: Turning Aside from the Image of God.

Caput IX: The Same Argument is Continued.

Caput X: The Lowest Degradation Reached by Degrees.

Caput XI: The Image of the Beast in Man.

Caput XII: There is a Kind of Hidden Wedlock in the Inner Man. Unlawful Pleasures of the Thoughts.

Caput XIII: The Opinion of Those Who Have Thought that the Mind Was Signified by the Man, the Bodily Sense by the Woman.

Caput XIV: What is the Difference Between Wisdom and Knowledge. The Worship of God is the Love of Him. How the Intellectual Cognizance of Eternal Things Comes to Pass Through Wisdom.

Caput XV: In Opposition to the Reminiscence of Plato and Pythagoras. Pythagoras the Samian. Of the Difference Between Wisdom and Knowledge, and of Seeking the Trinity in the Knowledge of Temporal Things.

Book 13

Caput I: The Attempt is Made to Distinguish Out of the Scriptures the Offices of Wisdom and of Knowledge. That in the Beginning of John Some Things that are Said Belong to Wisdom, Some to Knowledge. Some Things There are Only Known by the Help of Faith. How We See the Faith that is in Us. In the Same Narrative of John, Some Things are Known by the Sense of the Body, Others Only by the Reason of the Mind.

Caput II: Faith a Thing of the Heart, Not of the Body; How It is Common and One and the Same in All Believers. The Faith of Believers is One, No Otherwise than the Will of Those Who Will is One.

Caput III: Some Desires Being the Same in All, are Known to Each. The Poet Ennius.

Caput IV: The Will to Possess Blessedness is One in All, But the Variety of Wills is Very Great Concerning that Blessedness Itself.

Caput V: Of the Same Thing.

Caput VI: Why, When All Will to Be Blessed, that is Rather Chosen by Which One Withdraws from Being So.

Caput VII: Faith is Necessary, that Man May at Some Time Be Blessed, Which He Will Only Attain in the Future Life. The Blessedness of Proud Philosophers Ridiculous and Pitiable.

Caput VIII: Blessedness Cannot Exist Without Immortality.

Caput IX: We Say that Future Blessedness is Truly Eternal, Not Through Human Reasonings, But by the Help of Faith. The Immortality of Blessedness Becomes Credible from the Incarnation of the Son of God.

Caput X: There Was No Other More Suitable Way of Freeing Man from the Misery of Mortality Than The Incarnation of the Word. The Merits Which are Called Ours are the Gifts of God.

Caput XI: A Difficulty, How We are Justified in the Blood of the Son of God.

Caput XII: All, on Account of the Sin of Adam, Were Delivered into the Power of the Devil.

Caput XIII: Man Was to Be Rescued from the Power of the Devil, Not by Power, But by Righteousness.

Caput XIV: The Unobligated Death of Christ Has Freed Those Who Were Liable to Death.

Caput XV: Of the Same Subject.

Caput XVI: The Remains of Death and the Evil Things of the World Turn to Good for the Elect. How Fitly the Death of Christ Was Chosen, that We Might Be Justified in His Blood. What the Anger of God is.

Caput XVII: Other Advantages of the Incarnation.

Caput XVIII: Why the Son of God Took Man Upon Himself from the Race of Adam, and from a Virgin.

Caput XIX: What in the Incarnate Word Belongs to Knowledge, What to Wisdom.

Caput XX: What Has Been Treated of in This Book. How We Have Reached by Steps to a Certain Trinity, Which is Found in Practical Knowledge and True Faith.

Book 14

Caput I: What the Wisdom is of Which We are Here to Treat. Whence the Name of Philosopher Arose. What Has Been Already Said Concerning the Distinction of Knowledge and Wisdom.

Caput II: There is a Kind of Trinity in the Holding, Contemplating, and Loving of Faith Temporal, But One that Does Not Yet Attain to Being Properly an Image of God.

Caput III: A Difficulty Removed, Which Lies in the Way of What Has Just Been Said.

Caput IV: The Image of God is to Be Sought in the Immortality of the Rational Soul. How a Trinity is Demonstrated in the Mind.

Caput V: Whether the Mind of Infants Knows Itself.

Caput VI: How a Kind of Trinity Exists in the Mind Thinking of Itself. What is the Part of Thought in This Trinity.

Caput VII: The Thing is Made Plain by an Example. In What Way the Matter is Handled in Order to Help the Reader.

Caput VIII: The Trinity Which is the Image of God is Now to Be Sought in the Noblest Part of the Mind.

Caput IX: Whether Justice and the Other Virtues Cease to Exist in the Future Life.

Caput X: How a Trinity is Produced by the Mind Remembering, Understanding, and Loving Itself.

Caput XI: Whether Memory is Also of Things Present.

Caput XII: The Trinity in the Mind is the Image of God, in that It Remembers, Understands, and Loves God, Which to Do is Wisdom.

Caput XIII: How Any One Can Forget and Remember God.

Caput XIV: The Mind Loves God in Rightly Loving Itself; And If It Love Not God, It Must Be Said to Hate Itself. Even a Weak and Erring Mind is Always Strong in Remembering, Understanding, and Loving Itself. Let It Be Turned to God, that It May Be Blessed by Remembering, Understanding, and Loving Him.

Caput XV: Although the Soul Hopes for Blessedness, Yet It Does Not Remember Lost Blessedness, But Remembers God and the Rules of Righteousness. The Unchangeable Rules of Right Living are Known Even to the Ungodly.

Caput XVI: How the Image of God is Formed Anew in Man.

Caput XVII: How the Image of God in the Mind is Renewed Until the Likeness of God is Perfected in It in Blessedness.

Caput XVIII: Whether the Sentence of John is to Be Understood of Our Future Likeness with the Son of God in the Immortality Itself Also of the Body.

Caput XIX: John is Rather to Be Understood of Our Perfect Likeness with the Trinity in Life Eternal. Wisdom is Perfected in Happiness.

Book 15

Caput I: God is Above the Mind.

Caput II: God, Although Incomprehensible, is Ever to Be Sought. The Traces of the Trinity are Not Vainly Sought in the Creature.

Caput III: A Brief Recapitulation of All the Previous Books.

Caput IV: What Universal Nature Teaches Us Concerning God.

Caput V: How Difficult It is to Demonstrate the Trinity by Natural Reason.

Caput VI: How There is a Trinity in the Very Simplicity of God. Whether and How the Trinity that is God is Manifested from the Trinities Which Have Been Shown to Be in Men.

Caput VII: That It is Not Easy to Discover the Trinity that is God from the Trinities We Have Spoken of.

Caput VIII: How the Apostle Says that God is Now Seen by Us Through a Glass.

Caput IX: Of the Term ‘Enigma,’ And of Tropical Modes of Speech.

Caput X: Concerning the Word of the Mind, in Which We See the Word of God, as in a Glass and an Enigma.

Caput XI: The Likeness of the Divine Word, Such as It Is, is to Be Sought, Not in Our Own Outer and Sensible Word, But in the Inner and Mental One. There is the Greatest Possible Unlikeness Between Our Word and Knowledge and the Divine Word and Knowledge.

Caput XII: The Academic Philosophy.

Caput XIII: Still Further of the Difference Between the Knowledge and Word of Our Mind, and the Knowledge and Word of God.

Caput XIV: The Word of God is in All Things Equal to the Father, from Whom It is.

Caput XV: How Great is the Unlikeness Between Our Word and the Divine Word. Our Word Cannot Be or Be Called Eternal.

Caput XVI: Our Word is Never to Be Equalled to the Divine Word, Not Even When We Shall Be Like God.

Caput XVII: How the Holy Spirit is Called Love, and Whether He Alone is So Called. That the Holy Spirit is in the Scriptures Properly Called by the Name of Love.

Caput XVIII: No Gift of God is More Excellent Than Love.

Caput XIX: The Holy Spirit is Called the Gift of God in the Scriptures. By the Gift of the Holy Spirit is Meant the Gift Which is the Holy Spirit. The Holy Spirit is Specially Called Love, Although Not Only the Holy Spirit in the Trinity is Love.

Caput XX: Against Eunomius, Saying that the Son of God is the Son, Not of His Nature, But of His Will. Epilogue to What Has Been Said Already.

Caput XXI: Of the Likeness of the Father and of the Son Alleged to Be in Our Memory and Understanding. Of the Likeness of the Holy Spirit in Our Will or Love.

Caput XXII: How Great the Unlikeness is Between the Image of the Trinity Which We Have Found in Ourselves, and the Trinity Itself.

Caput XXIII: Augustin Dwells Still Further on the Disparity Between the Trinity Which is in Man, and the Trinity Which is God. The Trinity is Now Seen Through a Glass by the Help of Faith, that It May Hereafter Be More Clearly Seen in the Promised Sight Face to Face.

Caput XXIV: The Infirmity of the Human Mind.

Caput XXV: The Question Why the Holy Spirit is Not Begotten, and How He Proceeds from the Father and the Son, Will Only Be Understood When We are in Bliss.

Caput XXVI: The Holy Spirit Twice Given by Christ. The Procession of the Holy Spirit from the Father and from the Son is Apart from Time, Nor Can He Be Called the Son of Both.

Caput XXVII: What It is that Suffices Here to Solve the Question Why the Spirit is Not Said to Be Begotten, and Why the Father Alone is Unbegotten. What They Ought to Do Who Do Not Understand These Things.

Caput XXVIII: The Conclusion of the Book with a Prayer, and an Apology for Multitude of Words.

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