C.S. Lewis demanded that a person should not believe in Christianity before being convinced of its truthfulness. He once described himself by saying “I am an empirical Christian, I came to Christ through induction.”
Appeal to Imagination
But Lewis was not all argument, logic, and evidences. Another side of Lewis the apologist exists – the imaginative Lewis – which sets him apart in the genre of apologetics. Lewis believed that while apologists might reach people through argument, Christianity can also be conveyed imaginatively. He contended that our great need is not “more little books on Christianity, but more little books by Christians on other subjects – with their Christianity latent.” If the writer presents a story with Christianity providing its underlying meaning instead of relativism, hedonism, and materialism as its primary interpretive framework, the reader would be challenged to think of all things differently.
Here is a history of Narnia. Narnia story as evangelistic resource.
More on Narnia from David Tan, Justin, Colson, BK and Leon