Wise men don't need advice. Fools won't take it.

Fools make feasts, and wise men eat them

Of learned Fools I have seen ten times ten, Of unlearned wise men I have seen a hundred

Wise men talk because they have something to say; fools talk because they have to say something.

Logical consequences are the scarecrows of fools and the beacons of wise men.

In Greece wise men speak and fools decide.