“Why did C.S. Lewsis never join the Church”, catholics ask. Peter Kreeft has been so bold to suggest (although a tad bit fecisiously) that Lewis was on some mysterious mission from God to bridge the divide between Catholics and Protestants. Apparantly according to Kreeft, he ends up being almost neither; a sort of “Mere Christian”, writing in the open, consipring with angels in private. I think it’s merely a case of “I’m C.S. Lewis, and I’m not convinced of the claims of the Catholic Church.” I think the main issue that is so troublesome for many Catholics is that they see Lewis as the most universally clear headed popular Christian Thinker of the 20th Century, (behind Chesterton, but he was in a whole other category, wasn’t he), and yet he never took on the question directly.
Others make their propositions in books and weboards and such:
And you’re right.
One of the most clear-headed thinkers of all clear-headed thinkers. After all, why should anyone take on the question with others directly? Unless, of course, it’s with God himself. 
*Absolutely* no disrespect (or offense) meant. But, I’m of the mind that the trick is (and Lewis knew it, too) was simply to take care of your own back yard. (”Remove the beam from thine eye”, etc.). Do what you can to help your fellow man, live your life as fully and completely and honestly as you can, and for heaven’s sake, don’t Lord yourself over your “fellow man” so much that he can’t help you, too, when the occasion calls for it.
Every church, every denomination, has its place in the lives of their respective practitioners. I think a modern Christian comedian put it: “We all need handholds on our own faith.” True. A touchstone, if you will, to tell the real from the fake. Lewis’ “touchstone” always seemed to me to be simply a measure of self against his own Inner Voice (and “Whose” might that be?); not a judgment against his fellows, but his *own* struggles with his *own* faith, with a little wisdom added to the mix to benefit his fellow man.
We all wrestle with Angels. That’s what we’re here for, for heaven’s sake. To choose. It doesn’t get any more complicated than that.