Verse 9. - But I will declare forever; i.e. "I will declare these things" - viz. God's just judgments upon the wicked. I will sing praises to the God of Jacob. On the force of the phrase, "God of Jacob," see the comment upon Psalm 20:1.

75:6-10. No second causes will raise men to preferment without the First Cause. It comes neither from the east, nor from the west, nor from the south. He mentions not the north; the same word that signifies the north, signifies the secret place; and from the secret of God's counsel it does come. From God alone all must receive their doom. There are mixtures of mercy and grace in the cup of affliction, when it is put into the hands of God's people; mixtures of the curse, when it is put into the hands of the wicked. God's people have their share in common calamities, but the dregs of the cup are for the wicked. The exaltation of the Son of David will be the subject of the saints' everlasting praises. Then let sinners submit to the King of righteousness, and let believers rejoice in and obey him.But I will declare for ever,.... These are not the words of the psalmist, but of Christ, who is all along speaking in the psalm; what he would declare is not expressed, and is to be supplied in sense thus; either that he would declare the wonderful works of God, Psalm 75:1, so the Targum, his thoughts, mercies, and kindnesses to his people, as in Psalm 55:5, or his judgments on his enemies, whom he shall pass sentence on, which will be for ever; or the name of the Lord, his purposes and decrees, his counsel and covenant, his mind and will, his Gospel and the truth of it: see Psalm 22:22,

I will sing praises to the God of Jacob; the covenant God of his people, Christ's God, and their God; of his singing praise to him, see Psalm 22:22.