If we are honest, one of the truest clues for finding the most important truths is surprise. The real world is strange, not simple. And if we are full of pride and prejudice, we will not explore the bushes where the best game hides. For instance, we will not explore the puzzling, repellent, or difficult passages in Scripture, as Lewis does so wonderfully in “The Weight of Glory.” Nor will we marry women like Joy Davidman, who was gloriously other than Lewis, and not what he called one of his bachelor pipe dreams. In his apologetics, Lewis constantly turns difficulties into advantages, objections into arguments. As he says in Surprised by Joy, if any message from the core of reality were to reach us, we should expect to find in it just that unexpectedness that we find in the Christian faith: the taste of reality, not made by us, but hitting us in the face. In Mere Christianity, Lewis says that it’s no good asking for a simple religion. After all, real things are not simple. And besides being complicated, reality is usually very odd. “It is not neat, not obvious, not what you expect…. That is one of the reasons why I believe Christianity. It is a religion you could not have guessed.” It is not the sort of thing anyone would have made up. By the way, that is also a very old apologetic argument. We find it in Tertullian, who said, “I believe because it is absurd.” We find it in Kierkegaard, who called the incarnation “the absolute paradox.”
From C. S. Lewis as Philosopher: Truth, Goodness and Beauty (Baggett et al) in the essay “Lewis’s Philosophy of Truth, Goodness and Beauty” by Peter Kreeft.