Letter 124 — On the True Good as Attained by Reason (§19)

““What!” you say, “do dumb animals move in disturbed and ill-ordered fashion?” I should say that they moved in disturbed and ill-ordered fashion, if their nature admitted of order; as it is, they move in accordance with their nature. For that is said to be “disturbed” which can also at some other time be “not disturbed”; so, too, that is said to be in a state of trouble which can be in a state of peace. No man is vicious except one who has the capacity of virtue; in the case of dumb animals their motion is such as results from their nature.”