מְכַסֶּ֣ה פְ֭שָׁעָיו לֹ֣א יַצְלִ֑יחַ וּמוֹדֶ֖ה וְעֹזֵ֣ב יְרֻחָֽם׃
He that covereth his transgressions shall not prosper; But whoso confesseth and forsaketh them shall obtain mercy.
Read kabbalistic (mystical) interpretation of Proverbs 28:13: and classical mystical sources.