Psalms 66:7

“He ruleth by his power forever, etc.] Christ is the Ruler in Israel, King over his holy hill of Zion; who must reign till all enemies are put under his feet. He rules in the kingdom of nature and providence by his power, and does whatsoever he pleases; nor can any stay his hand. He rules in the kingdom of grace, in the hearts of his people, by his efficacious grace; which makes them willing, in the day of his power, to be subject to him; and in the latter day he will take to himself his great power and reign, when he will be King for ever. His kingdom is an everlasting kingdom, it shall never be subverted nor usurped; nor will he in it be succeeded by another; he will reign to the end of the…”

“behold the nations--watch their conduct.”

“He ruleth by his power for ever - literally, “Ruling by his power forever.” The idea is, that he does this constantly; in each age and generation. He never has ceased to rule; he never will. His dominion extends from age to age, and will stretch forward forever. The power which he evinced in delivering his people he retains now, and will retain forever. In that unchanging power, his people may confide; that unchanging power, the wicked should fear. His eyes behold the nations - All nations; all people. He sees all their conduct. They can conceal nothing from him. They should, therefore, stand in awe. The wicked have much to fear from One who sees all that they do, and who has power to crush…”

“66:7 God’s power brings redemption. The same word occurs in 65:6 for God’s power in creation (see also 80:2).”

“ruleth: Psa 62:11; Dan 4:35, Dan 6:26, Dan 6:27; Mat 6:13, Mat 28:18 his eyes: Psa 11:4, Psa 33:13; Ch2 16:9 let: Psa 2:10-12, Psa 52:1-5, Psa 73:3-12, Psa 75:4, Psa 75:5; Exo 18:11; Job 9:4; Isa 10:7-16; Isa 37:28, Isa 37:29; Dan 5:20-28 Psalms 66:8”