Morals of the Church

Reference Work — St. Thomas Aquinas

The Summa Theologica of St. Thomas Aquinas

First published 1274. Translated by Fathers of the English Dominican Province. English translation by the Fathers of the English Dominican Province, second and revised edition (Benziger Bros., 1920-22; public domain). Text from the Catena corpus (github.com/AlvaroBalbin/catena, MIT-licensed data layout), which captured it verbatim from newadvent.org/summa (retrieved 2026-07-09).

The Summa Theologica in the English Dominican Fathers' translation, complete with the Supplement — the source the manuals cite on nearly every question of principle (S. Th. I-II, II-II…).

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