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.

I am not an Athenian or a Greek, but a citizen of the world.

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

There is only a finger's difference between a wise man and a fool.

The only way to gall and fret effectively is for yourself to be a good and honest man.

What I like to drink most is wine that belongs to others.

We come into the world alone and we die alone. Why, in life, should we be any less alone?