On Being and Essence
Aquinas's earliest philosophical treatise (c. 1252) on the metaphysics of being — distinguishing essence and existence, and showing how this distinction underwrites the contingency of creatures and the unique necessity of God.
Contents
Source: English translation by Armand Maurer (PIMS, Toronto, 1949). Mirrored from aquinas.cc. · Latin text from the Leonine / Marietti editions (public domain), mirrored from aquinas.cc.