Wikiquote:Transwiki/Anecdotes about Diogenes preserved by Aulus Gellius

"Diogenes the Cynic also served as a slave, but he was a freeborn man, who was sold into slavery. When Xeniades of Corinth wished to buy him and asked whether he knew any trade, Diogenes replied: "I know how to govern free men." Then Xeniades, in admiration of his answer, bought him, set him free, and entrusting to him his own children, said: "Take my children to govern.""

- Aulus Gellius, Noctes Atticae, ii. 18.

"I must tell you how wittily Diogenes paid back a sophism of that kind which I have mentioned above, proposed with insulting intent by a logician of the Platonic school. For when the logician had asked: "You are not what I am, are you?" and Diogenes had admitted it, he added: "But I am a man." And when Diogenes had assented to that also and the logician had concluded: "Then you are not a man," Diogenes retorted: "That is a lie, but if you want it to be true, begin your proposition with me.""

- Aulus Gellius, Noctes Atticae, xviii. 13.