[T]he virtues arise in us neither by nature nor against nature. Rather, we are by nature able to acquire them, and we are completed through habit.
[B]oth excessive and deficient exercise ruin bodily strength, and, similarly, too much or too little eating or drinking ruins health, whereas the proportionate amount produces, increases, and preserves it.
[W]e are neither praised nor blamed insofar as we have feelings; for we do not praise the angry or the frightened person, and do not blame the person who is simply angry, but only the person who is angry in a particular way. We are praised or blamed, however, insofar as we have virtues or vices. Further, we are angry and afraid without decision; but the virtues are decisions of some kind, or rather require decision.