This was an enjoyable and enlightening read. Nicholi, who does write from a Christian perspective, offers a primer of both Freud's and Lewis' philosophy/ theology. Nicholi, a professor of psychiatry at Harvard and a frequent instructor on both men, shows the magnitude of both geniuses' impact in their respective fields. Both experienced similar childhoods and leaned into atheism, before Lewis' conversion to Christianity. Most compelling for me was the writings/beliefs of Freud and how he seemingly lived by a standard that he didn't believe in. He tied happiness to sexual practice, but was not out of sync with accepted sexual morality, apparently faithful to his wife and taught sexual restraint to his children. He didn't believe in the existence of God, but was fascinated by the devil. Considered belief in God a weakness, but had his own struggle with depression and was superstitious about his own death. In the end, many of his ideas are helpful and he's considered a "giant" for a reason. It seems that he missed the mark of theism and actually fought his will to believe, saying in college: "I do not intend to surrender." Lewis wrote that one's interpretation of findings often "depends on the kind of philosophy we bring." These two men, with similar experiences and similar fame, came to different conclusion on a number of issues related to God, humankind, and morality, becuase of their worldviews.