Wisdom from the Early Cynics, Diogenes 21

When mice crept on to the table he addressed them thus: "See now even Diogenes keeps parasites!" 

When Plato styled him a dog, "Quite true," he said, "for I come back again and again to those who have sold me." 

As he was leaving the public baths, somebody inquired if many men were bathing. He said, "No." But to another who asked if there was a great crowd of bathers, he said, "Yes." 

Plato had defined Man as an animal, biped and featherless, and was applauded. Diogenes plucked a fowl and brought it into the lecture-room with the words, "Here is Plato's man!" 

In consequence of which there was added to the definition, "having broad nails." 

To one who asked what was the proper time for lunch, he said, "If a rich man, when you will; if a poor man, when you can."

—Diogenes Laërtius, 6.40