But I will declare for ever; I will sing praises to the God of Jacob.
-The people resolve to praise forever the God of Jacob, for the anticipated cutting off of the wicked, and exaltation of the righteous.
Verse 9. I will declare - namely, the righteous judgments of God (Psalms 75:7-8).
Verse 10. All the horns of the wicked also will I cut off - i:e., I will announce as being cut off. The prophets are often said to do that which they announce as done, God being the real Doer (Jeremiah 1:10). The effect of the Church's praises and prayers will be, the horns of the wicked shall be cut off,
But the horns of the righteous shall be exalted.