'Folly' in the Bible

I said of partying, "It is folly," and of self-indulgent pleasure, "It accomplishes nothing!"

I realized that wisdom is preferable to folly, just as light is preferable to darkness:

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.

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.

This is the unfortunate fact about everything that happens on earth: the same fate awaits everyone. In addition to this, the hearts of all people are full of evil, and there is folly in their hearts during their lives -- then they die.

One dead fly makes the perfumer's ointment give off a rancid stench, so a little folly can outweigh much wisdom.