Man is the most intelligent of the animals - and the most silly. (Diogenes)
Being asked whether it's better to marry or not, he (Socrates) replied, Whichever you do you will repent it (Diogenes)
It was a favorite expression of Theophrastus that time was the most valuable thing that a man could spend. (Diogenes)
The great thieves lead away the little thief. (Diogenes)
I am not an Athenian or a Greek, but a citizen of the world. (Diogenes)
The sun, too, shines into cesspools and is not polluted. (Diogenes)
When I look upon seamen, men of science and philosophers, man is the wisest of all beings; when I look upon priests and prophets nothing is as contemptible as man. (Diogenes)
I have nothing to ask but that you would remove to the other side, that you may not, by intercepting the sunshine, take from me what you cannot give. (Diogenes)
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. (Diogenes)