"Talk sense to a fool and he calls you foolish."
- Euripides
"The fool doth think he is wise, but the wise man knows himself to be a fool."
- William Shakespeare
"Wise men profit more from fools than fools from wise men; for the wise men shun the mistakes of fools, but fools do not imitate the successes of the wise."
- Cato the Elder
"The whole problem with the world is that fools and fanatics are always so certain of themselves, but wiser people so full of doubts."
- Bertrand Russell
"Never give advice; the wise don't need it and fools won't heed it."
- Unknown
