The Summa Theologica is the great theological work written by Saint Thomas Aquinas in the thirteenth century, intended to explain and organize the teachings of the Catholic faith with clarity and reason. Drawing upon Sacred Scripture, the Church Fathers, philosophy, and centuries of Christian tradition, Saint Thomas addressed questions concerning God, creation, morality, virtue, sin, Christ, and the sacraments.
Written primarily as a guide for students of theology, the Summa presents theological questions followed by objections, responses, and detailed explanations rooted in faith and reason working together. Saint Thomas emphasized that all truth ultimately comes from God and that human reason, rightly ordered, can help lead souls toward divine truth.
Though unfinished at the time of his death, the Summa Theologica became one of the most influential works in Catholic theology and remains a foundational text for understanding doctrine, ethics, and Christian philosophy within the Church.
Saint Thomas Aquinas – Summa Theologica
Comprehensive theological work concerning God, morality, salvation, and the sacraments.
1 Peter 3:15
Christians are called to give a reason for the hope that is within them.
Wisdom 7:7
Wisdom is sought as a gift from God above earthly riches.
Pope Leo XIII – Aeterni Patris (1879)
Papal encouragement of the study of Saint Thomas Aquinas and scholastic theology.
Feast Day:
Saint Thomas Aquinas – January 28
Illustration by: Colton Rompala