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
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.
Caput II: That Some Ways of Speaking Concerning the Son are to Be Understood According to Either Rule.
Caput III: Some Things Concerning the Holy Spirit are to Be Understood According to the One Rule Only.
Caput IV: The Glorification of the Son by the Father Does Not Prove Inequality.
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.
Caput VI: The Creature is Not So Taken by the Holy Spirit as Flesh is by the Word.
Caput VII: A Doubt Raised About Divine Appearances.
Caput VIII: The Entire Trinity Invisible.
Caput IX: Against Those Who Believed the Father Only to Be Immortal and Invisible. The Truth to Be Sought by Peaceful Study.
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.
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.
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Yet it is not on this account to be thought that the matter of visible things is subservient to the bidding of those wicked angels; but rather to that of God, by whom this power is given, just so far as He, who is unchangeable, determines in His lofty and spiritual abode to give it. For water and fire and earth are subservient even to wicked men, who are condemned to the mines, in order that they may do therewith what they will, but only so far as is permitted. Nor, in truth, are those evil angels to be called creators, because by their means the magicians, withstanding the servant of God, made frogs and serpents; for it was not they who created them. But, in truth, some hidden seeds of all things that are born corporeally and visibly, are concealed in the corporeal elements of this world. For those seeds that are visible now to our eyes from fruits and living things, are quite distinct from the hidden seeds of those former seeds; from which, at the bidding of the Creator, the water produced the first swimming creatures and fowl, and the earth the first buds after their kind, and the first living creatures after their kind. For neither at that time were those seeds so drawn forth into products of their several kinds, as that the power of production was exhausted in those products; but oftentimes, suitable combinations of circumstances are wanting, whereby they may be enabled to burst forth and complete their species. For, consider, the very least shoot is a seed; for, if fitly consigned to the earth, it produces a tree. But of this shoot there is a yet more subtle seed in some grain of the same species, and this is visible even to us. But of this grain also there is further still a seed, which, although we are unable to see it with our eyes, yet we can conjecture its existence from our reason; because, except there were some such power in those elements, there would not so frequently be produced from the earth things which had not been sown there; nor yet so many animals, without any previous commixture of male and female; whether on the land, or in the water, which yet grow, and by commingling bring forth others, while themselves sprang up without any union of parents. And certainly bees do not conceive the seeds of their young by commixture, but gather them as they lie scattered over the earth with their mouth. For the Creator of these invisible seeds is the Creator of all things Himself; since whatever comes forth to our sight by being born, receives the first beginnings of its course from hidden seeds, and takes the successive increments of its proper size and its distinctive forms from these as it were original rules. As therefore we do not call parents the creators of men, nor farmers the creators of corn,—although it is by the outward application of their actions that the power of God operates within for the creating these things;—so it is not right to think not only the bad but even the good angels to be creators, if, through the subtilty of their perception and body, they know the seeds of things which to us are more hidden, and scatter them secretly through fit temperings of the elements, and so furnish opportunities of producing things, and of accelerating their increase. But neither do the good angels do these things, except as far as God commands, nor do the evil ones do them wrongfully, except as far as He righteously permits. For the malignity of the wicked one makes his own will wrongful; but the power to do so, he receives rightfully, whether for his own punishment, or, in the case of others, for the punishment of the wicked, or for the praise of the good.
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Accordingly, the Apostle Paul, distinguishing God’s creating and forming within, from the operations of the creature which are applied from without, and drawing a similitude from agriculture, says, “I planted, Apollos watered; but God gave the increase.” As, therefore, in the case of spiritual life itself, no one except God can work righteousness in our minds, yet men also are able to preach the gospel as an outward means, not only the good in sincerity, but also the evil in pretence; so in the creation of visible things it is God that works from within; but the exterior operations, whether of good or bad, of angels or men, or even of any kind of animal, according to His own absolute power, and to the distribution of faculties, and the several appetites for things pleasant, which He Himself has imparted, are applied by Him to that nature of things wherein He creates all things, in like manner as agriculture is to the soil. Wherefore I can no more call the bad angels, evoked by magic arts, the creators of the frogs and serpents, than I can say that bad men were creators of the corn crop, which I see to have sprung up through their labor.
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Just as Jacob, again, was not the creator of the colors in the flocks, because he placed the various colored rods for the several mothers, as they drank, to look at in conceiving. Yet neither were the cattle themselves creators of the variety of their own offspring, because the variegated image, impressed through their eyes by the sight of the varied rods, clave to their soul, but could affect the body that was animated by the spirit thus affected only through sympathy with this commingling, so far as to stain with color the tender beginnings of their offspring. For that they are so affected from themselves, whether the soul from the body, or the body from the soul, arises in truth from suitable reasons, which immutably exist in that highest wisdom of God Himself, which no extent of place contains; and which, while it is itself unchangeable, yet quits not one even of those things which are changeable, because there is not one of them that is not created by itself. For it was the unchangeable and invisible reason of the wisdom of God, by which all things are created, which caused not rods, but cattle, to be born from cattle; but that the color of the cattle conceived should be in any degree influenced by the variety of the rods, came to pass through the soul of the pregnant cattle being affected through their eyes from without, and so according to its own measure drawing inwardly within itself the rule of formation, which it received from the innermost power of its own Creator. How great, however, may be the power of the soul in affecting and changing corporeal substance (although certainly it cannot be called the creator of the body, because every cause of changeable and sensible substance, and all its measure and number and weight, by which are brought to pass both its being at all and its being of such and such a nature, arise from the intelligible and unchangeable life, which is above all things, and which reaches even to the most distant and earthly things), is a very copious subject, and one not now necessary. But I thought the act of Jacob about the cattle should be noticed, for this reason, viz. in order that it might be perceived that, if the man who thus placed those rods cannot be called the creator of the colors in the lambs and kids; nor yet even the souls themselves of the mothers, which colored the seeds conceived in the flesh by the image of variegated color, conceived through the eyes of the body, so far as nature permitted it; much less can it be said that the creators of the frogs and serpents were the bad angels, through whom the magicians of Pharaoh then made them.