Ecclesiastes 7:6

7:6 For like the crackling of quick-burning thorns under a cooking pot,

so is the laughter of the fool.

This kind of folly also is useless.

Ecclesiastes 7:25

True Righteousness and Wisdom are Virtually Nonexistent

7:25 I tried to understand, examine, and comprehend

the role of wisdom in the scheme of things,

and to understand the stupidity of wickedness and the insanity of folly.

Ecclesiastes 10:1

10:1 One dead fly makes the perfumer’s ointment give off a rancid stench,

so a little folly can outweigh much wisdom.