John Gill's Exposition of the Whole Bible
Proverbs 21:29
A wicked man hardeneth his face,.... Against all corrections and reproofs of parents, masters, ministers, and others; he blushes not at sins committed, and is not ashamed of them, but glories in them: or, he "strengthens with his face" l; he puts an impudent face upon his words, and confirms them by his impudence; if he tells the most notorious lies, and says things the most shameful and scandalous, his countenance does not alter, by which he would be thought to have spoken what is right and true;
but [as for] the upright, he directeth his way; or "his ways" m; according to the various reading; the man that is upright in heart, and walks uprightly, he directs his way according to the word of God; and, if he does amiss, when sensible he is ashamed of it, and amends.
l העז בפניו "roborat vultu suo", Baynus; "in faciebus suis", Montanus. m דרכיו τα οδους αυτου, Sept. "vias suas", Baynus, Tigurine version, Mercerus, Gejerus.