Letter 113 — On the Vitality of the Soul and Its Attributes (§19)

“For let us suppose that it is Prudence; how will Prudence assent to the opinion: “I must take a walk”? Nature does not allow this. For Prudence looks after the interests of its possessor, and not of its own self. Prudence cannot walk or be seated. Accordingly, it does not possess the power of assent, and it is not a living thing possessed of reason. But if virtue is a living thing, it is rational. But it is not rational; therefore it is not a living thing.”