“May his name endure forever, his fame continue as long as the sun! May people be blessed in him, all nations call him blessed!” – Psalm 72:17
This verse references back to the promise to Abraham (Gen 12:2-3). Here the psalmist is referring to a specific offspring enduring forever. It is the foretold Messiah whose fame will outlast the universe. The fulfillment of the promises made of the king are finally found in Jesus. Christ will outlast even creation itself and in the short time man is on earth we are called to reach the nations with his grace. Our merciful prayer is ALL nations worship God. Nothing could be more compassionate and loving.
The purpose of the missionary is not to force or trick following of Jesus Christ. However, the missionary must do all she can to give the lost tribes every chance to see Christ for what he is. The elect must love the lost enough to go to great extremes to show them Christ. Louis Berkhof said, “That He would give unto Him a numerous seed in reward for His accomplished work, a seed so numerous that it would be a multitude which no man could number, so that ultimately the Kingdom of the Messiah would embrace the people of all nations and tongues.” The local church must burn so deeply for the lost they will send their number around the globe to find and teach them.
The disciples of Christ must be greatly concerned about the eternity of the lost. We must go into the nations to share with them the one who outlasts all of creation. The Creator is the reason and the burden of missions. How easy it is to share the truth of the only one who will outlast the stars and the planets. His glory is worthy of our efforts and should drive us to the lost nations. Local churches are the send missionaries who are willing to stand in front of the heathens and beg them to give their lives to the only one worthy of worship.
 L. Berkhof, Systematic Theology (Grand Rapids, MI: Wm. B. Eerdmans publishing co., 1938), 270.