Documents in the Vatican’s files on Mother Teresa indicate she began to struggle with her belief in God at about the same time she began to care for the downtrodden in Calcutta. A new book by Mother Teresa’s postulator reveals many letters she reportedly wanted to destroy. “Lord, my God, you have thrown (me) away as unwanted—unloved,” she wrote. “I call, I cling, I want, and there is no one to answer, no, no one.” How do you react to the crisis of faith experienced by Mother Teresa?