Aquinas Studies
Thomas Aquinas & Augustine of Hippo, in parallel Latin and English
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Thomas Aquinas
Fourteen collections — the two Summas, the disputed questions, the biblical and Aristotelian commentaries, the opuscula.
Sentences Commentary
Summa Contra Gentiles
Summa Theologiae
Disputed Questions
Old Testament Commentaries
Gospel Commentaries
Pauline Commentaries
Aristotle Commentaries
Other Commentaries
Opuscula I - Treatises
Opuscula II - Polemical Writings
Opuscula III - Collations, Letters
- On Reasons for the Faith
- On the First and Second Decretals
- On the Articles of Faith and the Sacraments of the Church
- On the Catholic Faith of the Greek Fathers
- On the Form of Absolution
- Letter to John of Vercelli on the 108 Articles
- Letter to Bassiano of Lodi on the 30 Articles
- Letter to John of Vercelii on the 43 Articles
- Letter to Bassiano of Lodi on the 36 Articles
- Letter to Brother Gerard of Besançon on the 6 Articles
- A Letter on Credit Sales and Usury
- On Secret Faults
- On Lots
- On Astrology
- Letter to Abbot Bernard
- Letter to Margaret of Flanders
- On the Blend of the Elements
- On the Motion of the Heart
- On the Hidden Activities of Nature
Opuscula IV - Sermons, Liturgical Works
- Devotional Prayers
- Hymns and Songs
- Office of Corpus Christi - Sacerdos in aeternum
- Office of Corpus Christi - Sapientia aedificavit sibi
- Sermon from the Office - The Boundless Favors of Divine Generosity
- Sermon - He Who is Desired
- Sermon - Sing Praise and Be Glad
- Sermon - Let Us Throw Off the Works of Darkness
- Sermon - Hosanna to the Son of David
- Sermon - Behold Your King
- Sermon - Heaven and Earth
- Sermon - Behold I Send My Angel before Your Face
- Sermon - The Boy Jesus
- Sermon - A Sower Went Out
- Sermon - Ask, and You Will Receive
- Sermon - Send Out Your Spirit
- Sermon - Upon It Stood the Seraphim
- Sermon - Someone Made a Great Dinner
- Sermon - Beware of the False Prophets
- Sermon - There Was a Certain Rich Man
- Sermon - I Have Found David
- Sermon - A Light Has Gone Up for the Just
- Sermon - Let the Earth Bring Forth
- Sermon - Happy Those Who Live in Your House
- Sermon - Happy the Nation whose Lord is its God
- Sermon - Happy the Man Whose Help is from You
- Sermon Fragment, “Wisdom will Strengthen the Wise”
- Sermon Fragment, “Arise”
- Sermons on the Apostles' Creed
- Sermons on the Lord's Prayer
- Sermons on the Commandments
- Sermons on the Hail Mary
Augustine of Hippo
Thirteen collections — the Confessions, the City of God, the anti-Manichaean and anti-Pelagian polemics, the letters, sermons, and expositions of the Psalms.
Autobiographical Works
Philosophical Works
Dogmatic Works
Pastoral Works
Exegetical Works
- Teaching Christianity
- Miscellany of Eighty-three Questions
- Miscellany of Questions in Response to Simplician
- Eight Questions of Dulcitius
- On Genesis: A Refutation of the Manichees
- Unfinished Literal Commentary on Genesis
- The Literal Meaning of Genesis
- Questions on the Heptateuch
- Expressions in the Heptateuch
- Notes on Job
- Eight Questions from the Old Testament
- Answer to the Jews
- The Lord's Sermon on the Mount
- Agreement among the Evangelists
- Questions on the Gospels
- Seventeen Questions on Matthew
- De Scriptura sacra Speculum
- Expositio quarumdam propositionum ex Epistola ad Romanos
- Epistolae ad Romanos inchoata Expositio
- Expositio epistolae ad Galataa
Against Arianism and Other Heresies
Against Manichaeanism
- The Catholic Way of Life and the Manichean Way of Life
- The Two Souls
- A Debate with Fortunatus, a Manichean
- Answer to Adimantus, a Disciple of Mani
- Answer to the Letter of Mani Known as The Foundation
- Answer to Felix, a Manichean
- The Nature of the Good
- Answer to Secundinus, a Manichean
- Answer to Faustus, a Manichean
Against Donatism
- Psalm against the Party of Donatus
- Answer to the Writings of Petilian
- Answer to the Letter of Parmenian
- Baptism
- Letter to Catholics on the Sect of the Donatists
- Contra Cresconium grammaticum Donatistam
- De Unico Baptismo contra Petilianum
- Breviculus Collationis cum Donatistas
- Post Collationem ad Donatistas
- Sermo ad Caesareensis Ecclesiae
- De Gestis cum Emerito Donatistarum episcopo
- Contra Gaudentium Donatistarum episcopum
Against Pelagianism
- The Punishment and Forgiveness of Sins and the Baptism of Little Ones
- The Spirit and the Letter
- Nature and Grace
- The Perfection of Human Righteousness
- The Deeds of Pelagius
- The Grace of Christ and Original Sin
- The Nature and Origin of the Soul
- Marriage and Desire
- Answer to the Two Letters of the Pelagians
- Answer to Julian
- Unfinished Work in Answer to Julian
- Grace and Free Choice
- Rebuke and Grace
- The Predestination of the Saints
- The Gift of Perseverance