Matthew Henry Presbyterian @wholebiblehenry

Solomon here changes his style and manner of speaking. Hitherto, for the most part, since the beginning of ch. 10, he had laid down doctrinal truths, and but now and then dropped a word of exhortation, leaving us to make the application as we went along; but here, to the end of ch.

Commenting on Proverbs 22:17-21

John Gill Reformed Baptist @doctorgill

For it is a pleasant thing if thou keep them within thee,.... Or, "in thy belly" (a). That is, in thine heart, in the inmost recesses of it; where the words or doctrines of the wise should be received in the love of them, and carefully laid up and retained; which will upon reflection yield much pleasure, like Ezekiel's roll, which was in his belly...

Jamieson-Fausset-Brown Reformed @jfbcommentary

These lessons must be laid up in the mind, and fitted--or better, "fixed" in the lips so as to be ever ready.