דִּבְרֵ֥י פִי־חָכָ֖ם חֵ֑ן וְשִׂפְת֥וֹת כְּסִ֖יל תְּבַלְּעֶֽנּוּ׃
The words of a wise man’s mouth are gracious; but the lips of a fool will swallow up himself.
Read kabbalistic (mystical) interpretation of Ecclesiastes 10:12: and classical mystical sources.