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

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.

Do not keep company with a fool for as we can see he is a two-legged beast. Like an unseen thorn he pierces the heart with his sharp words.

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

I've never fooled anyone. I've let people fool themselves. They didn't bother to find out who and what I was. Instead they would invent a character for me. I wouldn't argue with them. They were obviously loving somebody I wasn't.

A fool's brain digests philosophy into folly, science into superstition, and art into pedantry. Hence University education.