A Man Has Free Choice To

From Summa Theologica Prima Pars, Question 83, where Aquinas discusses liberum arbitrium (free choice). The full argument runs: because humans act through rational deliberation rather than fixed instinct, and because reason can consider multiple possible courses of action, humans are not determined to a single outcome — and therefore possess free will. Aquinas grounded this in Aristotle's account of practical reason, while integrating it with Christian theology and the problem of grace and merit.