Thomas Aquinas
Medieval Scholastic philosopher
Thomas Aquinas was a thirteenth-century Italian theologian and philosopher whose synthesis of Aristotelian philosophy with Christian doctrine became foundational to Catholic thought.
His major work, the *Summa Theologica*, systematically addressed questions of God, ethics, and human nature.
Aquinas argued that faith and reason are complementary, not opposed.
His influence extends beyond theology into philosophy, law, and ethics—references to Thomistic or Aquinian thought signal his intellectual legacy.
Aquinas's comprehensive theological synthesis
- Doctor of the ChurchSaint recognized for doctrine
- God's existenceWhether a supreme being is
- TrinityGodhead as three persons
- graceEffortless beauty of motion
sacraments · transubstantiation · providence · salvation · original sin · predestination · faith and reason · apologetics
Of ancient systematic philosophy
- metaphysicsPhilosophy of existence's nature
- teleologyStudy of purpose in nature
- natural lawInherent moral principles
- realismAccepting things as they are
universals · essence · substance · accident · analogy · being · act · potency
Philosophy derived from Stagira's sage
- disputationFormal argumentative exchange
- syllogismFormal deductive argument structure
- dialecticsReasoning through contradiction
- commentariesExplanatory notes on texts
summa · objections · distinctions · University of Paris · medieval universities · Peter Lombard · Avicenna · synthesis
Moral goodness or merit
- prudenceCareful, wise judgment
- justiceFair treatment under law
- temperanceHabitual moderation in behavior
- fortitudeEnduring courage under pain
cardinal virtues · theological virtues · natural law · practical reason · human flourishing · telos · happiness · beatitude
Official declaration of sainthood
- saintCanonized holy person
- feast daySaint's commemorative holiday
- perennial philosophyUniversal truths across traditions
Summa Theologica
Aquinas's comprehensive theological synthesis
- Doctor of the ChurchSaint recognized for doctrine
- God's existenceWhether a supreme being is
- TrinityGodhead as three persons
grace · sacraments · transubstantiation · providence · salvation · original sin · predestination · faith and reason · apologetics · ecclesiology
Aristotelian
Of ancient systematic philosophy
- metaphysicsPhilosophy of existence's nature
- teleologyStudy of purpose in nature
- natural lawInherent moral principles
realism · universals · essence · substance · accident · analogy · being · act · potency · causation
Aristotelianism
Philosophy derived from Stagira's sage
- disputationFormal argumentative exchange
- syllogismFormal deductive argument structure
- dialecticsReasoning through contradiction
commentaries · summa · objections · distinctions · University of Paris · medieval universities · Peter Lombard · Avicenna · synthesis
virtue
Moral goodness or merit
- prudenceCareful, wise judgment
- justiceFair treatment under law
- temperanceHabitual moderation in behavior
fortitude · cardinal virtues · theological virtues · natural law · practical reason · human flourishing · telos · happiness · beatitude · conscience
canonization
Official declaration of sainthood
- saintCanonized holy person
- feast daySaint's commemorative holiday
- perennial philosophyUniversal truths across traditions
- Christian ApologistsC.S. Lewis, G.K. Chesterton, Augustine, Blaise Pascal, Athanasius
- Christian ThinkersAugustine, Bernard of Clairvaux, Athanasius, Pope John Paul II, John Paul II
- Church DoctorsAugustine, Jerome, Ambrose, Athanasius, Bernard of Clairvaux
- Dominican Friars
- Aristotle Scholars
- Dominican Saints
Thomas Aquinasmysticism
Pursuit of divine union
Pseudo-Dionysius · John of the Cross · Hildegard of Bingen · Bernard of Clairvaux · Julian of Norwich
Thomas Aquinasirrationalism
Doctrine dismissing logical thought
Martin Luther · William of Ockham · anti-intellectualism · Blaise Pascal · Friedrich Nietzsche
Thomas AquinasWilliam of Ockham
Scholastic who championed economy
nominalism · David Hume · materialism · Plato · Heraclitus