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Matthew Henry's Commentary – Verses 18–20
Verses 18–20

Such an illustrious prophecy as is in the foregoing verses of the Messiah and his kingdom may fitly be concluded, as it is here, with hearty prayers and praises.

I. The psalmist is here enlarged in thanksgivings for the prophecy and promise, Ps. 72:18, 19. So sure is every word of God, and with so much satisfaction may we rely upon it, that we have reason enough to give thanks for what he has said, though it be not yet done. We must own that for all the great things he has done for the world, for the church, for the children of men, for his own children, in the kingdom of providence, in the kingdom of grace, for all the power and trust lodged in the hands of the Redeemer, God is worthy to be praised; we must stir up ourselves and all that is within us to praise him after the best manner, and desire that all others may do it. Blessed be the Lord, that is, blessed be his glorious name; for it is only in his name that we can contribute any thing to his glory and blessedness, and yet that is also exalted above all blessing and praise. Let it be blessed for ever, it shall be blessed for ever, it deserves to be blessed for ever, and we hope to be forever blessing it. We are here taught to bless the name of Christ, and to bless God in Christ, for all that which he has done for u e3f s by him. We must bless him, 1. As the Lord God, as a self-existent self-sufficient Being, and our sovereign Lord. 2. As the God of Israel, in covenant with that people and worshipped by them, and who does this in performance of the truth unto Jacob and the mercy to Abraham, 3. As the God who only does wondrous things, in creation and providence, and especially this work of redemption, which excels them all. Men’s works are little, common, trifling things, and even these they could not do without him. But God does all by his own power, and they are wondrous things which he does, and such as will be the eternal admiration of saints and angels.

II. He is earnest in prayer for the accomplishment of this prophecy and promise: Let the whole earth be filled with his glory, as it will be when the kings of Tarshish, and the isles, shall bring presents to him. It is sad to think how empty the earth is of the glory of God, how little service and honour he has from a world to which he is such a bountiful benefactor. All those, therefore, that wish well to the honour of God and the welfare of mankind, cannot but desire that the earth may be filled with the discoveries of his glory, suitably returned in thankful acknowledgments of his glory. Let every heart, and every mouth, and every assembly, be filled with the high praises of God. We shall see how earnest David is in this prayer, and how much his heart is in it, if we observe, 1. How he shuts up the prayer with a double seal: “Amen and amen; again and again I say, I say it and let all others say the same, so be it. Amen to my prayer; Amen to the prayers of all the saints to this purport—Hallowed be thy name; thy kingdom come.” 2. How he ever shuts up his life with this prayer, Ps. 72:20. This was the last psalm that ever he penned, though not placed last in this collection; he penned it when he lay on his death-bed, and with this he breathes his last: “Let God be glorified, let the kingdom of the Messiah be set up, and kept up, in the world, and I have enough, I desire no more. With this let the prayers of David the son of Jesse be ended. Even so, come, Lord Jesus, come quickly.”