Psalms 37:8 Kabbalah

הֶ֣רֶף מֵ֭אַף וַעֲזֹ֣ב חֵמָ֑ה אַל־תִּ֝תְחַ֗ר אַךְ־לְהָרֵֽעַ׃

Cease from anger, and forsake wrath; fret not thyself, it tendeth only to evil-doing.

Read kabbalistic (mystical) interpretation of Psalms 37:8: and classical mystical sources.