בָּז־לְרֵעֵ֥הוּ חֲסַר־לֵ֑ב וְאִ֖ישׁ תְּבוּנ֣וֹת יַחֲרִֽישׁ׃
He that despiseth his neighbour lacketh understanding; But a man of discernment holdeth his peace.
Read kabbalistic (mystical) interpretation of Proverbs 11:12: and classical mystical sources.