One of the reasons that C.S. Lewis is still so popular and still speaks to people in this age is that he dealt with both reason and imagination. And he said at one point in his writings that "Reason is the natural organ of truth, and imagination is the organ of meaning." He argued, in a variety of places, that the only way you really understand any idea or set of ideas, is if you can get an image in your imagination with which to connect it. Of course, that was where he was so good. In his philosophical writings he had great pictures and metaphors that would make his point. And he could also communicate just as well in fiction. The Narnia Chronicles, or in the Space Trilogy, or Til We Have Faces communicate his philosophical ideas in a way that deeply impacts people's imagination. Art Lindsley, from True Truth on C.S. Lewis and imagination, Dick Staub Interview June 9th, 2004