The words of a wise man's mouth are gracious; but the lips of a fool will swallow up himself.
Gracious - literally, grace itself. So the Lord Jesus (Luke 2:52). The disciple of Christ similarly by gracious speech, like "enchantment," averts the sting of the old serpent (Proverbs 22:11; Proverbs 5:11).
Lips of a fool - whereas his thought was to swallow up others with his malicious speech (Proverbs 10:8; Proverbs 10:14; Proverbs 10:21; Proverbs 10:32).