St. Thomas Aquinas (1225 - 1274) was a Dominican friar, Catholic priest, and Doctor of the Church. He was an influential philosopher, theologian, and jurist. He was born in Italy.

He was a proponent of natural theology and he argued that reason is found in God. His influence on Western thought is considerable. Much of modern philosophy developed or opposed his ideas, particularly in the areas of ethics, natural law, metaphysics, and political theory. Unlike many currents in the Church of the time, Thomas embraced the ideas of Aristotle, whom he called "the Philosopher."

Included in this app are the following works, although some parts are only available in the full version:

Summa contra Gentiles (1259–1265)
Summa Theologiae (1265–1274)
A Patristic Commentary on Matthew
A Patristic Commentary on Mark
A Patristic Commentary on Luke
A Patristic Commentary on John
Commentary on 1 Corinthians
Commentary on 2 Corinthians
Commentary on Colossians
Commentary on Hebrews
Commentary on 1 Thessalonians
Commentary on Philippians
Commentary on Galatians
Commentary on John
The Apostles' Creed
The Ten Commandments
Entering The Religious Life
Compendium Of Theology
On Religious Orders
Contra Errores Graecorum
Letter To Margaret
On Lots
On Kingship

All these works are cross-linked to the Bible and to each other. There is also a text-to-speech option.