To Xeniades, who purchased him, he said, Come, see that you obey orders. When he quoted the line, Backward the streams flow to their founts, Diogenes asked, If you had been ill and had purchased a doctor, would you then, instead of obeying him, have said Backward the streams flow to their founts? Some one wanted to study philosophy under him. Diogenes gave him a tunny to carry and told him to follow him. And when for shame the man threw it away and departed, some time after on meeting him he laughed and said, The friendship between you and me was broken by a tunny. The version given by Diocles, however, is as follows. Some one having said to him, Lay your commands upon us, Diogenes, he took him away and gave him a cheese to carry, which cost half an obol. The other declined; whereupon he remarked, The friendship between you and me is broken by a little cheese worth half an obol.
The quote: One day, observing a child drinking out of his hands, he cast away the cup from his wallet with the words, A child has beaten me in plainness of living.
He also threw away his bowl when in like manner he saw a child who had broken his plate taking up his lentils with the hollow part of a morsel of bread. He used also to reason thus: All things belong to the gods. The wise are friends of the gods, and friends hold things in common. Therefore all things belong to the wise.