Two young Moravians heard of an island in the West Indies where an atheist British owner had 2000 to 3000 slaves. The owner had said, "No preacher, no clergyman, will ever stay on this island. If he's shipwrecked, we'll keep him in a separate house until he has to leave, but he's never going to talk to any of us about God. I'm through with all that nonsense." Three thousand slaves from the jungles of Africa (had been) brought to an island in the Atlantic and left there to live and die without hearing of Christ.
[These] two young Moravians heard about it. They sold themselves to the British planter and used the money they received from their sale—for he paid no more than he would for any slave—to pay their passage out to his island, for he wouldn't even transport them. As the ship left its pier in the river at Hamburg and was going out into the North Sea carried with the tide, the Moravians had come from Herrnhut to see these two lads (in their early twenties) off, never to return again, for this wasn't a four-year term—they sold themselves into lifetime slavery, simply that as slaves, they could [live as] Christians where these others were. The families were there, weeping, for they knew they would never see them again, and they wondered why they were going and questioned the wisdom of it.
As the gap widened and the housings had been cast off and were being curled up there on the pier, the young boys saw the widening gap, and one lad with his arm linked through the arm of his fellow, raised his hand, and shouted across the gap the last words that were heard from them. They were these, "MAY THE LAMB THAT WAS SLAIN RECEIVE THE REWARD OF HIS SUFFERING!" This became the call of Moravian missions. And this is the only reason for being: that the Lamb that was slain may receive the reward of His suffering!
Paris Reidhead (From his sermon, “Ten Shekels and a Shirt”)