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.
- Wherefore, having mastered this rule for interpreting the Scriptures concerning the Son of God, that we are to distinguish in them what relates to the form of God, in which He is equal to the Father, and what to the form of a servant which He took, in which He is less than the Father; we shall not be disquieted by apparently contrary and mutually repugnant sayings of the sacred books. For both the Son and the Holy Spirit, according to the form of God, are equal to the Father, because neither of them is a creature, as we have already shown: but according to the form of a servant He is less than the Father, because He Himself has said, “My Father is greater than I;” and He is less than Himself, because it is said of Him, He emptied Himself;” and He is less than the Holy Spirit, because He Himself says, “Whosoever speaketh a word against the Son of man, it shall be forgiven him; but whosoever speaketh against the Holy Ghost, it shall not be forgiven Him.” And in the Spirit too He wrought miracles, saying: “But if I with the Spirit of God cast out devils, no doubt the kingdom of God is come upon you.” And in Isaiah He says,—in the lesson which He Himself read in the synagogue, and showed without a scruple of doubt to be fulfilled concerning Himself,—“The Spirit of the Lord God,” He says, “is upon me: because He hath anointed me to preach good tidings unto the meek He hath sent me to proclaim liberty to the captives,” etc.: for the doing of which things He therefore declares Himself to be “sent,” because the Spirit of God is upon Him. According to the form of God, all things were made by Him; according to the form of a servant, He was Himself made of a woman, made under the law. According to the form of God, He and the Father are one; according to the form of a servant, He came not to do His own will, but the will of Him that sent Him. According to the form of God, “As the Father hath life in Himself, so hath He given to the Son to have life in Himself;” according to the form of a servant, His “soul is sorrowful even unto death;” and, “O my Father,” He says, “if it be possible, let this cup pass from me.” According to the form of God, “He is the True God, and eternal life;” according to the form of a servant, “He became obedient unto death, even the death of the cross.”—23. According to the form of God, all things that the Father hath are His, and “All mine,” He says, “are Thine, and Thine are mine;” according to the form of a servant, the doctrine is not His own, but His that sent Him.