Proverbs 21:29 - Matthew Poole's English Annotations on the Holy Bible

Hardeneth his face; continueth in evil courses with obstinacy and impudence, in spite of all the commands of God, or counsels of men. He directeth his way; he ordereth his steps aright; and if at any time, he goeth awry, he doth not add rebellion to his sin, nor persist in his error, but considereth his ways, and turneth his feet to God's testimonies, as David did, Psalms 119:59. Or, considereth his way, remembering with grief and shame what he hath done, and taking better heed to himself for the future.