Summa Theologica
Aquinas's summation of Christian theology, disputed article by article.
Ia Q.12 · How God Is Known by Us
Summa Theologica, Prima Pars, Question 12 — How God Is Known by Us (13 Articles).
Ia Q.11 · The Unity of God
Summa Theologica, Prima Pars, Question 11 — The Unity of God (4 Articles).
Ia Q.10 · The Eternity of God
Summa Theologica, Prima Pars, Question 10 — The Eternity of God (6 Articles).
Ia Q.9 · The Immutability of God
Summa Theologica, Prima Pars, Question 9 — The Immutability of God (2 Articles).
Ia Q.8 · The Existence of God in Things
Summa Theologica, Prima Pars, Question 8 — The Existence of God in Things (4 Articles).
Ia Q.7 · The Infinity of God
Summa Theologica, Prima Pars, Question 7 — The Infinity of God (4 Articles).
Ia Q.6 · The Goodness of God
Summa Theologica, Prima Pars, Question 6 — The Goodness of God (4 Articles).
Ia Q.5 · Of Goodness in General
Summa Theologica, Prima Pars, Question 5 — Of Goodness in General (6 Articles).
Ia Q.4 · The Perfection of God
Summa Theologica, Prima Pars, Question 4 — The Perfection of God (3 Articles).
Ia Q.3 · Of the Simplicity of God
Summa Theologica, Prima Pars, Question 3 — Of the Simplicity of God (8 Articles).
Ia Q.2 · The Existence of God
Summa Theologica, Prima Pars, Question 2 — The Existence of God (3 Articles).
Ia Q.1 · The Nature and Extent of Sacred Doctrine
Summa Theologica, Prima Pars, Question 1 — The Nature and Extent of Sacred Doctrine (10 Articles).
Charity
Charity is the third and greatest theological virtue: for Aquinas it is friendship with God — a love, poured in by grace, by which we love God for his own sake and our neighbour in him. It is “the form of the virtues.”
Hope
In Aquinas’s theology, hope is the second theological virtue: a movement of the will, raised by grace, that reaches toward eternal happiness as a future good — arduous, but possible to attain with God’s help.
Faith
In Thomas Aquinas’s theology, faith is a theological virtue: an act of the intellect assenting to divine truth at the command of a will moved by grace — firmer than opinion, yet concerned with things unseen.