Much of my career as a writer has revolved around the problem of pain. I return again and again to the same questions, as if fingering an old wound that never quite heals. I hear from readers of my books, and their anguished stories give human faces to my doubts. I remember a youth pastor calling me after he had learned that his wife and baby daughter were dying of AIDS because of a tainted blood transfusion. “How can I talk to my youth group about a loving God?” he asked.

I have learned to not even attempt an answer to…