My mercy will I keep for him for evermore, and my covenant shall stand fast with him.
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in redemption, yet the complaint that follows cuts sharp, God has seemingly abandoned His Church to her enemies, withdrawn all help and comfort, as though He had forgotten His own word.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
My mercy will I keep for him for evermore. The kings of David's line needed mercy, and mercy prevented their house from utterly perishing until the Son of Mary came. He needs no mercy for himself, but he is a representative man, and the mercy of God is required for those who are in him: for such mercy is kept for ever. And my covenant shall stand fast with him.
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