Thomas Aquinas on the Soul, Mind, and Human Renewal

An MVP version of Chapter 12 Volume 1 of the Neuroscience Edition

The 13th century saw European scholars integrate rediscovered Aristotelian texts with existing traditions, producing systematic philosophies of the human person. Thomas Aquinas (1225–1274), a Dominican friar, synthesized Aristotle with earlier thought in his Summa Theologica, addressing the soul, intellect, will, and character development. Though following Aristotle in locating higher functions in the heart, Aquinas viewed the rational soul as immortal and body-soul union essential. His emphasis on habit, virtue, and contemplation offers insights into human change and potential.

Thomas Aquinas, the brilliant synthesizer of philosophy and tradition (credit: Bartolomé Esteban Murillo / Wikimedia)

Picture young Thomas in Paris, the “dumb ox” mocked for silence. Challenged on theology, he responds brilliantly. Teacher Albert the Great declares, “This ox’s bellowing will be heard throughout the world.” This anecdote captures Aquinas’s reflective mind: quiet depth yielding insight.

Born near Naples, Aquinas joined Dominicans against family wishes, studying under Albert. His Summa Theologica explores thousands of questions on human nature (Prima Pars, Questions 75–89).

Aquinas adopted hylomorphism: soul as form of body, unifying the person. “The soul is in the body not as contained by it, but as containing it” (Summa, I, q. 76, a. 1). Body expresses soul’s powers.

Rational soul has vegetative, sensitive, intellectual levels. Intellect and will enable knowing and choosing. Sensation in heart, intellect immaterial.

Virtue ethics in Secunda Secundae: virtues as habits perfecting powers—prudence, justice. Acquired through repetition.

Contemplation highest: rational activity beholding truth. Anecdote: 1273 mystical experience made writings “straw”—shift to union.

Uplifting stories: Aquinas correcting monk gently—habit of kindness. Humility amid mockery built character.

Aquinas influenced philosophy: virtue theory in habit formation, contemplation paralleling mindfulness.

As we approach Renaissance, Aquinas highlights habit’s role in change—foundation for understanding adaptability.

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