“Mere Christianity” is a seminal work by C.S. Lewis, one of the most influential Christian writers of the 20th century. The book is a collection of radio talks that Lewis gave during World War II, where he presents a logical and thoughtful defense of the Christian faith and its core principles.
Divided into several sections, “Mere Christianity” addresses fundamental questions about morality, ethics, and the nature of God. Lewis begins by making a case for the existence of a moral law that transcends cultural differences and serves as a basis for evaluating human behavior. He argues that this moral law points to a higher, transcendent source, which he identifies as God.