God be merciful unto us, and bless us; and cause his face to shine upon us; Selah.
2 That thy way may be known upon earth, thy saving health among all nations.
3 Let the people praise thee, O God; let all the people praise thee.
4 O let the nations be glad and sing for joy: for thou shalt judge the people righteously, and govern the nations upon earth. Selah.
5 Let the people praise thee, O God; let all the people praise thee.
6 Then shall the earth yield her increase; and God, even our own God, shall bless us.
7 God shall bless us; and all the ends of the earth shall fear him.
By faith the Psalmist had a foretaste of God’s salvation, by faith he believed in the promised Lamb of God, and his faith summons the people to raise their song of praise. Yet for us the assurance of salvation was firmly established at Calvary. “The kingdom of grace was instituted immediately after the fall of man, when a plan was devised for the redemption of the guilty race. It then existed in the purpose and by the promise of God; and through faith, men could become its subjects and taste its assurance. Yet it was not actually established until the death of Christ. Then the fulfillment of the plan of redemption was assured. The promise of salvation made to the sinful pair in Eden was ratified. The kingdom of grace, which had before existed by the promise of God, was then established” (The Great Controversy, pp. 347-348).
If the Psalmist calls for praise because of a promise yet to come, then so much more we are to be motivated to render praises because the promise is already fulfilled by the Lamb of God.