And I gave my heart to know wisdom, and to know madness and folly: I perceived that this also is vexation of spirit.

And I turned myself to behold wisdom, and madness, and folly: for what can the man do that cometh after the king? even that which hath been already done.

Wisdom excelleth folly, as far as light excelleth darkness.

The wisdom of the prudent is to understand his way: but the folly of fools is deceit.

The fool hath said in his heart, There is no God. They are corrupt, they have done abominable works, there is none that doeth good.

Though thou shouldest bray a fool in a mortar among wheat with a pestle, yet will not his foolishness depart from him.