Oddly enough I never read any C.S. Lewis. Not into all that fantasy stuff with lions and princes symbolizing the Church or whatever. It would probably help if I could somehow find the time to read up on all those British authors who converted to Catholicism. I tried reading Graham Greene's biography once but didn't get very far, and frankly the conversion parts made me shudder oddly. Must give it another shot. I'll pencil that in for 2006 or so.
Edited to say, I figured it out. It's by, of all people, Tolkien, and it's this:
If he'd written more of that sort of thing, I would have been a fan.