Descent Into Hell by Charles Williams

C.S. Lewis: Hell is where you go to make an ash of yourself. What once was a man is no longer a man, he says. You can't get there in this life, but you can approach that and shards your pieces of personality without anything to hold them together. If you want to be really scared, read a book that's very difficult because it's written by a mystic who doesn't have a clear vision of things," she says.