When asked what learning was the most necessary, he said, “Not to unlearn what you have learned!”

Xenophanes speaks thus:-And no man knows distinctly anything,And no man ever will.

Pittacus said that half was more than the whole.

Courage, my boy! that is the complexion of virtue.

Time is the image of eternity.

Bury me on my face," said Diogenes; and when he was asked why, he replied, "Because in a little while everything will be turned upside down.

A man once asked Diogenes what was the proper time for supper, and he made answer, "If you are a rich man, whenever you please; and if you are a poor man, whenever you can.