If you want to read some thriller stories, pick up a biography about Hudson Taylor, David Livingstone, or William Carey. If you want to be stirred by heroic endurance and courage, read about Adoniram Judson, Mary Slessor, or Amy Carmichael. These Christians—and a host of others—saw God do the impossible in foreign fields. They took seriously Christ’s command to give the entire world the Gospel, and they acted. And because they acted, to this day there remains fruit to their efforts.