As a matter of self-preservation, a man needs good friends or ardent enemies, for the former instruct him and the latter take him to task.

Aren't you ashamed, you who walk backward along the whole path of existence, and blame me for walking backward along the path of the promenade?

Those who have virtue always in their mouths, and neglect it in practice, are like a harp, which emits a sound pleasing to others, while itself is insensible of the music.

The health and vigor necessary for the practice of what is good, depend equally on both mind and body.

Dogs and philosophers do the greatest good and get the fewest rewards.

I do not know whether there are gods, but there ought to be.

I like best the wine drunk at the cost of others.