Each night, as young Caleb closed his eyes, he felt the darkness envelop him. The silence of his room was regularly suspended by the creaking of the wooden house in Costa Rica. Then the bats in the attic became more active. His mother had put a nightlight in his room, but the young boy still feared the dark. One night Caleb’s dad posted a Bible verse on the footboard of his bed. It read: “Be strong and courageous. Do not be afraid; . . . for the Lord your God will be with you” (Joshua 1:9). Caleb began to read…