And that repentance and remission of sins should be preached in His name among all nations, beginning at Jerusalem. – Luke 24:47

The text says that repentance and remission of sins should be preached in His name among all nations. Here, then, we have the divine warrant for missions. They are no speculations, or enthusiastic dreams. They are matters of divine command. I daresay you have heard of what the Duke of Wellington said to a missionary in India who was questioning whether it was of any use to preach the gospel to the Hindus. “What are your marching orders?” said this man of discipline and obedience. “What are your marching orders?” That is the deciding question. Now the marching orders are, “Go you into all the world and preach the gospel to every creature.” …We are to preach the gospel everywhere; missions are to be universal. All nations need the preaching of the word. The gospel is a remedy for every human ill among all the races that live upon the face of the earth. Some out of all nations shall receive it, for there shall be gathered before the eternal throne men out of every kindred, nation, and tongue. No nation will utterly refuse it. There will be found a remnant according to the election of grace even among the most perverse of the tribes of men.

Brethren, there was a Divine necessity that Christ should die, and an equally imperative must that He should arise again from the dead. But there is an equally absolute necessity that Jesus should be preached to every creature under heaven. It behooves to be so. Who, then, will linger? Let us each one, according to his ability and opportunity, tell to all around us the story of the forgiveness of sin through the Mediator’s sacrifice to as many as confess their sin and forsake it. We are bidden to preach repentance of sin and faith in our Lord Jesus Christ, let us not be slow to do so. ~ C.H. Spurgeon