Adoniram Judson

How do Christians discharge this trust committed to them? They let three-fourths of the world sleep the sleep of death, ignorant of the simple truth that a Savior died for them. Content if they can be useful in the little circle of their acquaintances, they quietly sit and see whole nations perish for the lack of knowledge.

Charles Spurgeon

"'I have much people in this city.'
Acts 18:10

This should be a great encouragement to try to do good, since God has among the vilest of the vile, the most reprobate, the most debauched and drunken, an elect people who must be saved. When you take the Word to them, you do so because God has ordained you to be the messenger of life to their souls, and they must receive it, for so the decree of predestination runs. They are as much redeemed by blood as the saints before the eternal throne. They are Christ's property, and yet perhaps they are lovers of the ale-house, and haters of holiness; but if Jesus Christ purchased them he will have them. God is not unfaithful to forget the price which his Son has paid. He will not suffer his substitution to be in any case an ineffectual, dead thing. Tens of thousands of redeemed ones are not regenerated yet, but regenerated they must be; and this is our comfort when we go forth to them with the quickening Word of God.

John Piper

For the Bridegroom will not come until the gospel is preached to the nations, and the nations are reached through spiritual breakthroughs that come by fasting and prayer.