Whoever among you thinks himself wise must become a fool to be truly wise

A fool's wild speech confounds the wise.

the wise may be instructed by a fool

A fool's paradise is a wise man's hell.

This fellow is wise enough to play the fool;
And to do that well craves a kind of wit:
He must observe their mood on whom he jests,
The quality of persons, and the time,
And, like the haggard, check at every feather
That comes before his eye. This is a practise
As full of labour as a wise man's art
For folly that he wisely shows is fit;
But wise men, folly-fall'n, quite taint their wit.

Love is the wisdom of the fool and the folly of the wise.

Passion often makes fools of the wisest men and gives the silliest wisdom.

Speak wisdom to a fool and he'll think you have no sense at all

the only difference between a wise man and a fool was in the magnitude of his mistakes. To err was human, and the smarter and more powerful you were, the greater the scope of your screwup.

Talk sense to a fool and he calls you foolish.

The fool doth think he is wise, yet it is the wise man that knows himself to be the fool As You Like It, Act 5, Scene 1

A wise man can say a foolish thing at any time, anywhere, and to anybody.

There is a foolish corner in the brain of the wisest man.

The only real difference between a wise man and a fool, Moore knew, was that the wise man tended to make more serious mistakes — and only because no one trusted a fool with really crucial decisions; only the wise had the opportunity to lose battles, or nations.