I pissed on the man who called me a dog. Why was he so surprised?

Wise kings generally have wise counselors; and he must be a wise man himself who is capable of distinguishing one.

It takes a wise man to discover a wise man.

If you are to be kept right, you must possess either good friends or red-hot enemies. The one will warn you, the other will expose you.

Man is the most intelligent of the animals - and the most silly.

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

Antisthenes used to say that envious people were devoured by their own disposition, just as iron is by rust. Envy of others comes from comparing what they have with what the envious person has, rather than the envious person realising they have more than what they could have and certainly more than some others and being grateful. It is really just an inability to get a correct perspective on their lives.