And whereas they commanded to leave the stump of the tree roots; thy kingdom shall be sure unto thee, after that thou shalt have known that the heavens do rule.
Thy kingdom shall be sure unto thee, after that thou shalt have known ... - a promise of spiritual grace to him, causing the judgment to humble, not harden, his heart.
That the heavens do rule - the plural is used as addressed to Nebuchadnezzar, the head of an organized earthly kingdom, with various principalities, under the supreme ruler. So "the kingdom of heaven" (Matthew 4:17; Grotius, 'kingdom of the heavens') is a manifold organization, composed of various orders of angels, under the Most High (Ephesians 1:20-21; Ephesians 3:10, "the principalities and powers in heavenly places;" Colossians 1:16, "thrones, or dominions, or principalities, or powers").