יְרָֽא־אֶת־יְהוָ֣ה בְּנִ֣י וָמֶ֑לֶךְ עִם־שׁ֝וֹנִ֗ים אַל־תִּתְעָרָֽב׃
My son, fear thou the LORD and the king, And meddle not with them that are given to change;
Read kabbalistic (mystical) interpretation of Proverbs 24:21: and classical mystical sources.