Albert Barnes Commentary Proverbs 16:22

"Understanding is a well-spring of life unto him that hath it; But the correction of fools is [their] folly." — Proverbs 16:22 (ASV)

Wellspring of life - Compare Proverbs 10:11 note. the instruction of fools—Not that which they give, but that which they receive. Compare Proverbs 14:24. Folly is its own all-sufficient punishment.