Proverbs 15:21 in the King James Version
Folly is joy to him that is destitute of wisdom: but a man of understanding walketh uprightly.
Context
20 A wise son makes a father glad, but a foolish man despises his mother.
21 Folly is joy to one who is void of wisdom, but a man of understanding keeps his way straight.
22 Where there is no counsel, plans fail; but in a multitude of counselors they are established.