The most important work of the towering intellectual of the Middle Ages, Thomas Aquinas's Summa Theologiae remains one of the great seminal works of philosophy and theology, while extending to subjects as diverse as law and government, sacraments and liturgy, and psychology and ethics. One of the largest volumes in the Summa Theologiae, Thomas tackles every virtue and every vice, laying out their relations, causes, and definitions.

Notes on text:

The Latin text used in this volume is based on the Leonine Edition. The English translation of the Summa Theologiae was prepared by Fr. Laurence Shapcote, O.P.