C. S. Lewis is generally thought of as a commonsense Christian, one who offers theology that is understandable and morality that is practical. And yet, when writing about Narnia to a class of fifth graders who asked if it were possible to visit Aslan's country, Lewis replied that the only way he knew of was through death but then added this curious qualifier: "Perhaps some very good people get just a tiny glimpse before then." This simple sentence...