"Now that I am a Christian I do have moods in which the whole thing looks very improbable."
- C.S. Lewis, Mere Christianity
Great admission, however Lewis then went on to add, "...but when I was an atheist I had moods in which Christianity looked terribly probable. This rebellion of your moods against your real self is going to come anyway. That is why Faith is such a necessary virtue: unless you teach your moods where they get off, you can never be either a sound Christian or even a sound atheist, but just a creature dithering to and fro, with its beliefs really dependent on the weather and the state of its digestion. Consequently one must train the habit of Faith."