Lewis then attempts to explain why a good God would allow bad things to happen by emphasizing the importance of free will. God grants people free will, which allows them to choose between good and evil, and they will be richly rewarded in heaven for overcoming temptation.

At the end of part two, Lewis discusses Jesus Christ, the central figure of the Christian faith. He asserts that the only way to achieve true goodness is to worship Christ. Despite differences in Christian denominations, they all agree on the essential truths about Christ's presence, which unites them in salvation.