Either this man was, and is, the Son of God, or else a madman or something worse. He would either be a lunatic - on the level with the man who says he is a poached egg - or else he would be the Devil of Hell. A man who was merely a man and said the sort of things Jesus said would not be a great moral teacher. “I am trying here to prevent anyone saying the really foolish thing that people often say about Him: I’m ready to accept Jesus as a great moral teacher, but I don’t accept his claim to be God. Though Lewis was borrowing from others who previously made similar arguments, he gave the argument its most well-known form: One of Lewis’ most popular apologetics is his Liar, Lord, or Lunatic trilemma. We Must Decide What We Will Do with Christ. There is much we can learn from Mere Christianity.

This central claim is packaged in a hodge-podge of philosophical and theological arguments for the existence of God written with a veneer of the common man. His book is a defense that there is a God, and this God saves humanity through the person and work of Jesus Christ. Lewis presented himself as a “very ordinary layman of the Church of England.” What Lewis is trying to communicate is a defense for what he would call essential Christianity - a core of beliefs that Christians from all circles would agree upon. Mere Christianity derives its title from Lewis’ aim to give a defense of “the belief that has been common to nearly all Christians at all times” (viii). But in the summer of 1952 Geoffrey Bles, who had encouraged Lewis to compile these into one apologetic, published the work as Mere Christianity. It was originally published as three separate volumes. Most of the material found in the book is actually from a series of BBC radio talks from 1941-1944 during World War II. Mere Christianity was not intended to be a book. His more popular non-fiction works are Miracles, The Problem of Pain, Surprised by Joy, and Mere Christianity.

The Space Trilogy was written before Lewis became a converted Christian.

Lewis’ most well-known fiction works are his Chronicles of Narnia, Space Trilogy, and The Screwtape Letters. Lewis was an author of fiction, but he also wrote a few pieces of non-fiction which served as a Christian apologetic. Lewis with the rise of the Chronicles of Narnia series. He also died the day in which President John F. Clive Staples (C.S.) Lewis was born in 1898.

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