The Lord hath prepared his throne in the heavens - He has “fixed” his throne there. This is the ground of the security that his blessing will be imparted to those who fear him, and to their children’s children, or that it will be transmitted to coming generations. God is a Sovereign. His throne is fixed and firm. His dominion is not vacillating and changing. His reign is not, like the reign of earthly monarchs, dependent on the capriciousness of a changeable will, or on passion; nor is it liable to be altered by death, by revolution, or a new dynasty. The throne of God is ever the same, and nothing can shake or overthrow it. Compare the notes at Psalms 11:4.
And his kingdom ruleth over all - He reigns over all the universe - the heavens and the earth; and he can, therefore, execute all his purposes. Compare Psalms 47:2.