(Psalm 85) God’s anger

You have taken away all Your wrath; You have turned from the fierceness of Your anger. Restore us, O God of our salvation, and cause Your anger toward us to cease.

If God were truly impassible, we would have no way to relate to Him. God’s anger, God’s wrath is not like human anger. He does not “fly off the handle”. Yet it is described as being fierce.