Charles H. Spurgeon on Psalms 145:13

Thy kingdom is an everlasting kingdom. His meditation has brought him near to God, and God near to him: he speaks to him in adoration, changing the pronoun from "his" to "thy." He sees the great King, and prostrates himself before him. It is well when our devotion opens the gate of heaven, and enters within the portal, to speak with God face to face, as a man speaketh with his friend. The point upon which the Psalmist's mind rests is the eternity of the divine throne, —"thy reign is a reign of all eternities." The Lord's kingdom is without beginning, without break, without bound, and without end. He never abdicates his throne, neither does he call in a second to share his empire. None can overthrow his power, or break away from his rule. Neither this age, nor the age to come, nor ages of ages shall cause his sovereignty to fail. Herein is rest for faith. "The Lord sitteth King for ever." And thy dominion endureth throughout all generations. Men come and go like shadows on the wall, but God reigneth eternally. We distinguish kings as they succeed each other by calling them first and second; but this King is Jehovah, the First and the Last. Adam in his generation knew his Creator to be King, and the last of his race shall know the same. All hail, Great God I Thou art ever Lord of lords!

These three verses are a reverent hymn concerning "the kingdom of God": they will be best appreciated by those who are in that kingdom in the fullest sense, and are most truly loyal to the Lord. It is, according to these verses, a kingdom of glory and power; a kingdom of light which men are to know, and of might which men are to feel; it is full of majesty and eternity; it is the benediction of every generation. We are to speak of it, talk of it, and make it known, and then we are to acknowledge it in the homage directed distinctly to the Lord himself —as in Ps 145:13. In these three verses Jehovah is adored for his gracious providence towards men and all other creatures; this fitly follows the proclamation of his royalty, for we here see how he rules his kingdom, and provides for his subjects.