For all the variety of specific religious beliefs, there are fundamentally only two kinds of people: believers and non-believers. In the 20th century, no spokesman was more prominent for non-belief than Sigmund Freud, and nobody argued for belief more successfully than C.S. Lewis. Indeed, their arguments are remarkably parallel, and equally wide-ranging. From pain and suffering to love and sex, from God to morality, Lewis and Freud carefully argued opposing positions. After years of studying both men, and teaching a popular course at Harvard comparing the two, renowned psychiatrist and educator Armand Nicholi has gone public. Nicholi is a guide to the Great Debate, letting each man speak clearly and concisely. Drawing on published and unpublished sources, including wide access to Freud's letters, Nicholi offers a gem of a book that strikes at the deepest chords in our souls.