The reign of the King of the universe is not national, or even imperial, but universal. God is King of kings and Lord of lords (Rev. 19:16), not merely king of the nation of Israel.

David began the psalm with his own experience, and then, poetically, included with himself all that fear the Lord, in partaking of God’s goodness. Now he calls on all creation, animate and inanimate, to unite in blessing the Lord.