Important to note that many Diogenes stories are long after the man died, and there’s some mythologizing with him.

Here’s a fun story though:

Menippus in his Sale of Diogenes tells how, when he was captured and put up for sale, he was asked what he could do. He replied, “Govern men.” And he told the crier to give notice in case anybody wanted to purchase a master for himself. Having been forbidden to sit down, “It makes no difference,” said he, “for in whatever position fishes lie, they still find purchasers.” And he said he marvelled that before we buy a jar or dish we try whether it rings true, but if it is a man are content merely to look at him. To Xeniades who purchased him he said, “You must obey me, although I am a slave; for, if a physician or a steersman were in slavery, he would be obeyed.”