John Calvin Commentary Psalms 66:7

"He ruleth by his might for ever; His eyes observe the nations: Let not the rebellious exalt themselves. Selah" — Psalms 66:7 (ASV)

He rules by His power over the world. The Hebrew word עולם, olam, which I have translated the world, occasionally signifies an age, or eternity; but the first sense seems to agree best with the context. The meaning of these words is that God is endowed with the power necessary for wielding the government of the world.

What follows agrees with this: that His eyes behold the nations. Under the Law, Judea was the proper seat of His kingdom, but His providence always extended to the world at large. The special favor shown to the posterity of Abraham, in consideration of the covenant, did not prevent Him from also extending an eye of providential consideration to the surrounding nations.

As evidence of His care reaching the different countries around, He takes notice of the judgments God executed upon the wicked and the ungodly. He proves that God overlooked no part of the human family by referring to the punishment of evildoers. There may be much in the Divine administration of the world calculated to perplex our conclusions; however, there are always some tokens of His judgments to be seen, and these are sufficiently clear to strike the eye of an acute and attentive observer.