Read this: Passport through Darkness: A True Story of Danger and Second Chances, by Kimberly L. Smith.
For perhaps most Americans, their faith consists of going to church on Sunday, sending up an occasional prayer, and being nice. Some volunteer at church, or for a local ministry. Some read their Bible on a regular basis. A few go on short-term mission trips. But for Kimberly Smith, none of that was enough. She and her husband sensed God calling them away from their comfortable lives and onto the mission field.