Solomon
Proverbs 22:15ESV·traditional attribution

Folly is bound up in the heart of a child, but the rod of discipline drives it far from him.

Matthew Henry Presbyterian @wholebiblehenry

We have here two very sad considerations: - 1. That corruption is woven into our nature. Sin is foolishness; it is contrary both to our right reason and to our true interest. It is in the heart; there is an inward inclination to sin, to speak and act foolishly.

John Gill Reformed Baptist @doctorgill

Foolishness is bound in the heart of a child,.... That is, sin, the greatest of all folly; this is naturally in the heart of man; it is in the heart of a child, it is in him from his infancy; it is bound in his heart, it is rooted and riveted in him, being conceived in sin, and shapen in iniquity; it is what cleaves...

Jamieson-Fausset-Brown Reformed @jfbcommentary

is bound--or firmly fixed. Chastisement deters from crime and so leads to reformation of principle.