Diogenes for the Day, 8/30/2018

Someone wanted to study philosophy under him. Diogenes gave him a fish to carry, and told him to follow him. And when for shame the man threw it away and departed, some time later on meeting him Diogenes laughed and said, "The friendship between you and me was broken by a fish." 

The version given by Diocles, however, is as follows. Someone 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 man declined, whereupon Diogenes remarked, "The friendship between you and me is broken by a little cheese worth half an obol."