"Some day millions upon millions from heathenism will march by the throne and, pointing a finger of scorn at us, they will cry: 'No man cared for my soul.' And then you and I will try to justify ourselves by exclaiming , 'But, Lord, am I my brother's keeper?' And God will answer, 'The voice of thy brother's blood crieth unto me from Africa, from China, from the islands of the sea.' The voice of thy brother's blood. Yes, and you will go into Heaven, saved, but--with blood on your hands, the blood of those you might have won had you gone or sent someone in your place." -Oswald J. Smith, "The Challenge of Missions"
"Son of man, I have appointed you a watchman over the house of Israel; whenever you hear a word from My mouth, warn them from Me. When I say to the wicked, 'You will surely die,' and you do not warn him or speak out to warn the wicked from his wicked way that he may live that wicked man shall die in his iniquity, but his blood I will require at your hand. yet if you have warned the wicked and he does not turn from his wickendess or from his wicked way, he shall die in his iniquity; but you have delivered yourself." -Ezekiel 3:17-19