The Rt. Rev. John Shelby Spong, D.D., is the retired bishop of the Episcopal Diocese of Newark. As the author of 14 books, he is the most published member of the House of Bishops of the Episcopal Church in the United States. His bestsellers include "Rescuing the Bible From Fundamentalism" and "Why Christianity Must Change or Die." He is a frequent lecturer at conference centers and on college campuses and will be a guest lecturer at Harvard this spring.