A friend is a second self, so that our consciousness of a friend's existence...makes us more fully conscious of our own existence.

The greatest crimes are caused by surfeit, not by want.

Happiness, then, is found to be something perfect and self-sufficient, being the end to which our actions are directed.

To die, and thus avoid poverty or love, or anything painful, is not the part of a brave man, but rather of a coward; for it is cowardice to avoid trouble, and the suicide does not undergo death because it is honorable, but in order to avoid evil.

Excellence or virtue in a man will be the disposition which renders him a good man and also which will cause him to perform his function well.

Consider pleasures as they depart, not as they come.

Virtue makes us aim at the right end, and practical wisdom makes us take the right means.