Voluntas et libertas
Freedom is rooted in rational appetite, not in indifference without nature
Every appetite tends toward an apprehended good. Sense appetite follows particular goods under sensible presentation; the will is rational appetite, ordered toward the good as universally apprehended. Because no finite good exhausts goodness itself, the will is not necessitated to choose this particular means under every circumstance. It can compare, deliberate and elect.
Freedom does not mean acting without reasons or nature. An uncaused random event would not be a free choice. The agent is free because he acts from an interior principle with knowledge of the end, not because the act lacks explanation. Motives incline; habits dispose; passions attract; circumstances constrain; yet the rational subject can judge these goods in relation to a more universal end and accept or refuse a proposed course.
The will necessarily desires happiness in the broad sense of complete good, but it can err about where happiness lies and choose defective means. Moral evil therefore does not require a positive power created for evil. It arises when a free act lacks the order due to it. Grace heals and elevates freedom; it does not treat freedom as independence from truth.
Arguments about moral responsibility, revelation and conversion depend upon this account. If every assent were the inevitable result of prior material conditions, praise, blame, inquiry and persuasion would become practical fictions. The act of apologetics itself presupposes that reasons can move a person as reasons. The apologist respects freedom by presenting truth without manipulation, while recognizing that intellectual error can be strengthened by passion, habit, interest and fear.
Reader path: Summa Theologiae I-II, q. 6-17 · Leo XIII, Libertas
