פַּלְגֵי־מַ֣יִם לֶב־מֶ֭לֶךְ בְּיַד־יְהוָ֑ה עַֽל־כָּל־אֲשֶׁ֖ר יַחְפֹּ֣ץ יַטֶּֽנּוּ׃
The king’s heart is in the hand of the LORD, as the watercourses: He turneth it whithersoever He will.
Read kabbalistic (mystical) interpretation of Proverbs 21:1: and classical mystical sources.