Mere Christianity originated as a series of four books, transcribed from a selection of informal radio broadcasts by Lewis. Its message is ecumenical, tearing down the walls between denominations by uniting around the person of Christ as the center of the Christian faith. Lewis uses the universal idea of right and wrong as a clue to the meaning of the universe in the first section. He then uses this exposition to fuel his apologetic outline of the Christian faith. He continues by teaching on the Christian behavior and virtues, placing special emphasis on the role of pride as the chief sin of which all other vices stem. In the last section, Lewis approaches various doctrinal ideas within Christianity, such as the trinity, predestination, sacrifice, and sanctification.
Mere Christianity was the first book on Christian doctrine I ever read. As a fifteen year old high school sophomore, I read through C. S. Lewis’s classic with my youth pastor. It was my first encounter with Christian doctrine and it introduced me to Christian thought. I include this book on my list because of it being my first experience with doctrine and theology.