Renowned psychiatrist and educator Armand Nicholi presents a fascinating comparison of the beliefs of Sigmund Freud and C. S. Lewis. For all the variety of specific religious beliefs, there are fundamentally only two kinds of people: believers and nonbelievers. In the 20th century, no spokesman was more prominent for nonbelief than Sigmund Freud, and nobody argued for belief more successfully than C.S. Lewis. From pain and suffering to love and sex, from God to morality, Lewis and Freud carefully argued opposing positions and even considered the chief objections to their positions. Based on years of studying both men, including wide access to Freud's letters, and teaching a popular course at Harvard comparing the two, this debate on the greatest of subjects strikes at the deepest chords in our souls.