Over the heathen, i.e. over all heathen nations, as being the King of all the earth, Psalms 47:7; which was not true in David's time, but; was fulfilled by Christ. God sitteth upon the throne, to wit, as Judge and King, exercising dominion, or reigning, as he now said; this being only another expression of the same thing. And this holy throne is either,
1. The ark, upon which God was said to sit to govern the Israelites. Or rather,
2. Heaven; which is oft called God's throne, Psalms 11:4 Isaiah 66:1, whence God is said to behold and to rule all nations; of which general dominion of God he here speaks. And here Christ sits at his Father's right hand for that purpose.