Shared ground
Psalm 75:9–10 closes by joining two themes: ongoing praise and a promised reversal. The speaker commits to keep “declaring” what the psalm has been saying about God’s rule and judgment (explicit in v.9’s “forever”). The address to the “God of Jacob” ties this praise to Israel’s shared story and to God’s long-standing faithfulness across generations (explicit in the wording).
The reversal is pictured through “horns” (horns), a common image for strength, honor, and public power. The wicked lose their “horns” (their power/status is ended), while the righteous have their “horns” lifted up (their standing is raised). The “but” makes the contrast the point (explicit in v.10).
Where interpretation differs (only where needed)
Who is the “I”? Some read the “I” as the psalm’s human voice (a singer/poet, or the worshiping community speaking together). Others read v.10 especially as God speaking directly (“I will cut off…”), since it matches the psalm’s earlier focus on God as judge and decider.
What kind of reversal is in view? Some read the “horn” language mainly as personal moral outcome (God humbles the proud and honors the faithful). Others think it also includes public and political realities (leaders, nations, or oppressors being removed and the vulnerable being restored), because “horn” can be used for royal power and public dominance.
When does it happen? Some hear an expectation of a near-term resolution to a present crisis. Others hear a longer horizon: confidence that even if the situation is not quickly fixed, God’s final judgment will reverse it.
Why the disagreement exists
The last two verses are short and poetic, and they do not name the speaker or the setting. Also, the psalm shifts between describing God, warning the arrogant, and voicing strong future outcomes. That makes it possible to read the closing lines either as a human vow plus a report of what God will do, or as God’s own concluding statement spoken through the psalm.
What this passage clearly contributes
This ending reinforces the psalm’s central claim: human pride and power are not permanent, and God is the one who lowers and raises. It also shows that the proper conclusion to this view of reality is durable public praise (“forever”), not merely a momentary reaction. The “horns” contrast compresses the psalm’s message into a memorable final line: wicked strength is cut down; righteous standing is lifted up (explicit reversal language), even if the timing is not specified.