In the early part of the 20th century, an ad appeared in a London newspaper: Men wanted for hazardous journey; small wages, bigger cold, long months of complete darkness, constant danger. Safe return doubtful. Honor and recognition in case of success.

The ad was signed by Sir Ernest Shackleton, Antarctic explorer. And thousands responded to the call. 

I believe there are hundreds of thousands of young people who are waiting for a really challenging, dangerous job that requires them to give up everything. You may be one. The reward? Being a part of the climaxing event of all history - taking the Gospel to every person on earth.

-Loren Cunningham, Making Jesus Lord, pp. 58-59