The church spends $1.5 million for every one new follower of Jesus. Apple sells 26 iPads every minute. What is it that makes Apple so exciting and Jesus so boring? What is it that compels someone to bring their iPod everywhere and their Bible nowhere? In a word: marketing. Jesus is a life-changing product with lousy salespeople--people who are intimidated and embarrassed by the word "evangelism" and who show more enthusiasm for their gadgets than...