Read this from David Livingston book..

[Sister Alvear]

A missionary came to Mabotsa, so David and Mary established a new station at Chonuane, and there, with his own hands, he built his third house. One day the chief, Sechele, called all his people together and listened to the white man's message. "This is wonderful," exclaimed the chief. "But my forefathers were living, at the same time yours were. How is it that they never heard of the love of God and of Jesus the Saviour? Why did they all pass away into deep darkness?" The chief's words still sound out an indictment against the Christian church, which even now is trifling with our Lord's command to evangelize all nations. No less than three-fourths of mankind are now passing out into the terrible darkness of which Sechele spoke so sadly...