'Foolishness' in the Bible

So I dedicated myself to learn about wisdom and knowledge, and about insanity and foolishness. And I discovered that this is also like chasing after the wind.

I decided to indulge in wine, while still remaining committed to wisdom. I also tried to indulge in foolishness, just enough to determine whether it was good for human beings under heaven given the short time of their lives.

Next I turned to examine wisdom, insanity, and foolishness, because what can a person do who succeeds the king except what has already been accomplished?

I concluded that wisdom is more useful than foolishness, just as light is more useful than darkness.

I committed myself to understand, to learn, to search for wisdom and explanations, and to understand both the evil that is foolishness and the stupidity that is delusion.

As dead flies cause the perfumer's ointment to stink, so also does a little foolishness to one's reputation of wisdom and honor.

Foolishness is given great honor, while the prosperous sit in lowly places.

He begins his speech with foolishness, and concludes it with evil madness.