מ֘וֹכִ֤יחַ אָדָ֣ם אַ֭חֲרַי חֵ֣ן יִמְצָ֑א מִֽמַּחֲלִ֥יק לָשֽׁוֹן׃
He that rebuketh a man shall in the end find more favour Than he that flattereth with the tongue.
Read kabbalistic (mystical) interpretation of Proverbs 28:23: and classical mystical sources.