The man who remains a fool even in advanced age is really a fool, just as the Indra-Varuna fruit does not become sweet no matter how ripe it might become.

Never argue with a fool, onlookers may not be able to tell the difference.

Any intelligent fool can make things bigger, more complex, and more violent. It takes a touch of genius -- and a lot of courage -- to move in the opposite direction.

Somebody does somethin' stupid, that's human. They don't stop when they see it's wrong, that's a fool.

There is small disproportion betwixt a fool who useth not wit because he hath it not and him that useth it not when it should avail him.

A fool too late bewares when all the peril is past.