The Summa Theologica of St. Thomas Aquinas is one of the foundational texts of Western philosophy and theology. Written in the 13th century, it offers a systematic and comprehensive account of Christian doctrine, covering topics such as the nature of God, the creation of the world, the human soul, and the sacraments. In this volume, Aquinas discusses the nature of moral virtue, exploring questions such as how virtues are acquired, how they relate...