Proverbs 15:21 in the World English Bible
Folly is joy to one who is void of wisdom, but a man of understanding keeps his way straight.
Context
20 A wise son maketh a glad father: but a foolish man despiseth his mother.
21 Folly is joy to him that is destitute of wisdom: but a man of understanding walketh uprightly.
22 Without counsel purposes are disappointed: but in the multitude of counsellors they are established.