Summa Theologiae · III

Third Part (Tertia Pars)

Name: Summa Theologiae, Third Part
Author: Thomas Aquinas

Thomas Aquinas, Summa Theologiae. 90 questions, 549 articles.

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Text: Summa Theologiae, Project Gutenberg #19950, Third Part (Tertia Pars), translated by the Fathers of the English Dominican Province. The Third Part of the Summa in the English Dominican translation (first printed 1911 to 1925; second and revised edition from 1920). A sample check on 2026-11-09 against pre-1931 printings at the Internet Archive (first printings of 1915 and 1916 and the second and revised edition of the 1920s) found that the article text matches, with no 1947 introduction, synopsis, or index. The phrase “From the Complete American Edition” in Gutenberg's catalog title is a provenance note only. Question and article numbers were added by the transcriber. The Gutenberg text ends at question 90 of the Third Part, where Aquinas stopped writing; the Supplement is a separate edition here, transcribed from 1917 to 1922 printings of the same translation. Rights: Public domain (US)

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Prologue

Forasmuch as our Saviour the Lord Jesus Christ, in order to "save His people from their sins" (Matt. 1:21), as the angel announced, showed unto us in His own Person the way of truth, whereby we may attain to the bliss of eternal life by rising again, it is necessary, in order to complete the work of theology, that after considering the last end of human life, and the virtues and vices, there should follow the consideration of the Saviour of all, and of the benefits bestowed by Him on the human race.

Concerning this we must consider (1) the Saviour Himself; (2) the sacraments by which we attain to our salvation; (3) the end of immortal life to which we attain by the resurrection.

Concerning the first, a double consideration occurs: the first, about the mystery of the Incarnation itself, whereby God was made man for our salvation; the second, about such things as were done and suffered by our Saviour--i.e. God incarnate.

TREATISE ON THE INCARNATION (QQ. 1-59)

Questions

Of the Fitness of the Incarnation (6 articles)
Of the Mode of Union of the Word Incarnate (12 articles)
Of the Mode of Union on the Part of the Person Assuming (8 articles)
Of the Mode of Union on the Part of the Human Nature (6 articles)
Of the Parts of Human Nature Which Were Assumed (4 articles)
Of the Order of Assumption (6 articles)
Of the Grace of Christ as an Individual Man (13 articles)
Of the Grace of Christ, as He Is the Head of the Church (8 articles)
Of Christ's Knowledge in General (4 articles)
Of the Beatific Knowledge of Christ's Soul (4 articles)
Of the Knowledge Imprinted or Infused in the Soul of Christ (6 articles)
Of the Acquired or Empiric Knowledge of Christ's Soul (4 articles)
Of the Power of Christ's Soul (4 articles)
Of the Defects of Body Assumed by the Son of God (4 articles)
Of the Defects of Soul Assumed by Christ (10 articles)
Of Those Things Which Are Applicable to Christ in His Being and Becoming (12 articles)
Of Christ's Unity of Being (2 articles)
Of Christ's Unity of Will (6 articles)
Of the Unity of Christ's Operation (4 articles)
Of Christ's Subjection to the Father (2 articles)
Of Christ's Prayer (4 articles)
Of the Priesthood of Christ (6 articles)
Of Adoption as Befitting to Christ (4 articles)
Of the Predestination of Christ (4 articles)
Of the Adoration of Christ (6 articles)
Of Christ as Called the Mediator of God and Man (2 articles)
Of the Sanctification of the Blessed Virgin (6 articles)
Of the Virginity of the Mother of God (4 articles)
Of the Espousals of the Mother of God (2 articles)
Of the Annunciation of the Blessed Virgin (4 articles)
Of the Matter from Which the Saviour's Body Was Conceived (8 articles)
Of the Active Principle in Christ's Conception (4 articles)
Of the Mode and Order of Christ's Conception (4 articles)
Of the Perfection of the Child Conceived (4 articles)
Of Christ's Nativity (8 articles)
Of the Manifestation of the Newly Born Christ (8 articles)
Of Christ's Circumcision, and of the Other Legal Observances Accomplished in Regard to the Child Christ (4 articles)
Of the Baptism of John (6 articles)
Of the Baptizing of Christ (8 articles)
Of Christ's Manner of Life (4 articles)
Of Christ's Temptation (4 articles)
Of Christ's Doctrine (4 articles)
Of the Miracles Worked by Christ, in General (4 articles)
Of (Christ's) Miracles Considered Specifically (4 articles)
Of Christ's Transfiguration (4 articles)
The Passion of Christ (12 articles)
Of the Efficient Cause of Christ's Passion (6 articles)
Of the Efficiency of Christ's Passion (6 articles)
Of the Effects of Christ's Passion (6 articles)
Of the Death of Christ (6 articles)
Of Christ's Burial (4 articles)
Of Christ's Descent into Hell (8 articles)
Of Christ's Resurrection (4 articles)
Of the Quality of Christ Rising Again (4 articles)
Of the Manifestation of the Resurrection (6 articles)
Of the Causality of Christ's Resurrection (2 articles)
Of the Ascension of Christ (6 articles)
Of Christ's Sitting at the Right Hand of the Father (4 articles)
Of Christ's Judiciary Power (6 articles)

Treatise on the Sacraments

What Is a Sacrament? (8 articles)
Of the Necessity of the Sacraments (4 articles)
Of the Sacraments' Principal Effect, Which Is Grace (6 articles)
Of the Other Effect of the Sacraments, Which Is a Character (6 articles)
Of the Causes of the Sacraments (10 articles)
Of the Number of the Sacraments (4 articles)
Of the Sacrament of Baptism (12 articles)
Of the Ministers by Whom the Sacrament of Baptism Is Conferred (8 articles)
Of Those Who Receive Baptism (12 articles)
Of the Effects of Baptism (10 articles)
Of Circumcision (4 articles)
Of the Preparations That Accompany Baptism (4 articles)
Of the Sacrament of Confirmation (12 articles)
Of the Sacrament of the Eucharist (6 articles)
Of the Matter of This Sacrament (8 articles)
Of the Change of Bread and Wine into the Body and Blood of Christ (8 articles)
Of the Way in Which Christ Is in This Sacrament (8 articles)
Of the Accidents Which Remain in This Sacrament (8 articles)
Of the Form of This Sacrament (6 articles)
Of the Effects of This Sacrament (8 articles)
Of the Use or Receiving of This Sacrament in General (12 articles)
Of the Use Which Christ Made of This Sacrament at Its Institution (4 articles)
Of the Minister of This Sacrament (10 articles)
Of the Rite of This Sacrament (6 articles)
Of the Sacrament of Penance (10 articles)
Of Penance as a Virtue (6 articles)
Of the Effect of Penance, as Regards the Pardon of Mortal Sin (6 articles)
Of the Remission of Venial Sin (4 articles)
Of the Return of Sins Which Have Been Taken Away by Penance (4 articles)
Of the Recovery of Virtue by Means of Penance (6 articles)
Of the Parts of Penance, in General (4 articles)

Aquinas left the Third Part unfinished here, at question 90, where the Gutenberg files end. The Supplement completes it.

Also online, linked only: the same translation at New Advent and the Latin text at Corpus Thomisticum. Neither is copied here.

Source: Thomas Aquinas. Summa Theologica, Third Part. Project Gutenberg #19950. Project Gutenberg record. Public domain in the USA. Outside the U.S., check local copyright rules. Project Gutenberg notices retained. The full Project Gutenberg license is kept in the hosted text.

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Third Part (Tertia Pars)

Prologue

Questions

Treatise on the Sacraments