Clear and Compelling Reasoning From the Master Apologist First delivered as an informal radio address during World War II to bring hope to an embattled public, "The Case for Christianity" is C.S. Lewis's artful and compelling argument for the reasonableness of Christian faith. Dividing his case into two parts, "Right and Wrong as a Clue to the Meaning of the Universe" and "What Christians Believe", Lewis uses all the powers of his formidable wit and logic and the strength of his convictions to shed light on this most important subject.