Aren't You Afraid of the Atomic Warfare?

C.S. Lewis has a very famous passage here where he says this: "If your life is going to matter, it can only matter from the inside emotionally" Leo Tolstoy's The Confessions tells how his secular belief about the universe started to fall on him and start to crush him. But why dwell on that? Just try to enjoy life and don't think too much about that big picture.