Theologian · 1225 – 1274
Thomas Aquinas
Key Takeaways
- Aquinas reconciled Christian theology with the philosophy of Aristotle.
- His Summa Theologica is one of the most influential works of philosophy and theology.
- He proposed the "Five Ways", famous arguments for the existence of God.
- His thought (Thomism) remains central to Catholic philosophy today.
Thomas Aquinas was the supreme theologian of the Middle Ages and the master of scholasticism. His life’s work was a grand synthesis: to show that the newly recovered philosophy of Aristotle and the truths of Christian faith were not enemies but allies.
Faith and reason
Drawing on Aristotle — and on the Islamic philosophers Avicenna and Averroes — Aquinas argued that reason and revelation are complementary roads to truth. Reason can establish much about God and the natural world; revelation supplies what lies beyond reason’s reach.
The Summa Theologica
His monumental Summa Theologica organized the whole of Christian theology with the rigor of a logician, including the famous Five Ways of arguing for the existence of God. It became the backbone of Catholic thought.
Legacy
Though some of his Aristotelian positions were briefly condemned, Aquinas was canonized as a saint and named a Doctor of the Church. His system, Thomism, remains a living philosophical tradition, and he is counted among the most influential thinkers in Western history — alongside medieval lights like Hildegard of Bingen.
Influence
Aquinas shaped Western philosophy and Catholic theology more than almost any other medieval thinker; his integration of reason and faith remains foundational, and Thomism is still a living philosophical tradition.
Legacy
Canonized as a saint and named a Doctor of the Church, Aquinas is regarded as the greatest of the scholastic theologians and one of the most influential philosophers in history.
Major Works
- Summa Theologica
- Summa Contra Gentiles
Controversies
- Some of his Aristotelian positions were initially controversial and even condemned shortly after his death, before his later canonization.
Notable Quotes
“Better to illuminate than merely to shine.”
Connections
Frequently Asked Questions
Who was Thomas Aquinas?
Thomas Aquinas (1225–1274) was a medieval Italian theologian and philosopher who reconciled Christian theology with Aristotle's philosophy in the Summa Theologica.
What are the Five Ways?
The Five Ways are Aquinas's five philosophical arguments for the existence of God, based on motion, causation, contingency, degrees of perfection and the order of nature.
Citations & Sources
People Like Thomas
Aristotle
98Aristotle was a Greek philosopher and polymath whose writings on logic, ethics, biology, politics and metaphysics shaped Western thought for over two millennia.
Why Aquinas built his entire system on Aristotle, whom he called simply 'The Philosopher'.
Avicenna
90Avicenna was a Persian polymath of the Islamic Golden Age, one of the greatest physicians and philosophers of the medieval world, whose Canon of Medicine was a standard text for six centuries.
Why Avicenna's metaphysics shaped Aquinas's arguments about being and God.
Averroes
87Averroes was a philosopher and polymath of Al-Andalus whose commentaries on Aristotle profoundly shaped medieval European philosophy and the relationship between reason and faith.
Why Aquinas engaged closely with — and contested — Averroes's reading of Aristotle.
Hildegard of Bingen
84Hildegard of Bingen was a German Benedictine abbess and one of the most remarkable polymaths of the Middle Ages — a visionary, composer, writer, healer and natural philosopher.
Why A fellow towering figure of medieval Christian intellectual and spiritual life.
Immanuel Kant
94Immanuel Kant was a German philosopher of the Enlightenment, one of the most influential thinkers in history, who reconciled rationalism and empiricism and transformed ethics, metaphysics and epistemology.
Why Also a philosopher · Worked in philosophy & ethics
Siddhartha Gautama
97Siddhartha Gautama, known as the Buddha, was a spiritual teacher of ancient India whose insights into suffering and liberation founded Buddhism, now one of the world's major religions.
Why Also a philosopher · Worked in ethics & metaphysics