Also I will make him my firstborn, higher than the kings of the earth.
The writer of this psalm approaches God's throne with the covenant made to David as his anchor: God promised to sustain His favor toward this people forever through their king. He rehearses God's power in all creation and His faithfulness in redemption, yet the complaint that follows cuts sharp, God has seemingly abandoned His Church to her enemies, withdrawn all help and comfort, as though He had forgotten His own word.
AI summary
Commenting on Psalm 89:1-52
Also I will make him my firstborn. Among the kings the seed of David were to be most favoured and indulged with most love and paternal regard from God: but in Jesus we see this in the highest degree verified, for he has preeminence in all things, inasmuch as by inheritance he has a more glorious name than any other, and is higher than the kings of the earth.
The covenant God made with David and his seed was mentioned before (Psa 89:3, Psa 89:4); but in these verses it is enlarged upon, and pleaded with God, for favour to the royal family, now almost sunk and ruined; yet certainly it looks at Christ, and has its accomplishment in him much more than in David; nay, some passages here are scarcely applicable at all...
Commenting on Psalm 89:19-37