The antidote for fifty enemies is one friend.

Wishing to be friends is quick work, but friendship is a slow ripening fruit.

In all things of nature there is something of the marvelous.

We assume therefore that moral virtue is the quality of acting in the best way in relation to pleasures and pains, and that vice is the opposite.

These virtues are formed in man by his doing the actions ... The good of man is a working of the soul in the way of excellence in a complete life.

Some vices miss what is right because they are deficient, others because they are excessive, in feelings or in actions, while virtue finds and chooses the mean.

The quality of life is determined by its activities.