For miscellaneous discussions and remarks not suitable for top-level posts even in the Discussion section, let alone in Main.
(Naturally, if a discussion gets too unwieldy, celebrate by turning it into a top-level post, just like in the good old days.)
What exactly about it makes you angry?
I'm having trouble explaining myself, so maybe an example of Lewis' text with an approximation of my response at the time will suffice. This clip was chosen because it was the last straw that prompted me to write an email to several friends to vent about the my issue with Lewis.
I tend to get annoyed when an author throws a couple vague metaphors, then tells me that I ought to do something. I get even more annoyed when they tell me that I am insane if I don't follow their advice. At this point in the reading I actually shouted out loud "WHY!?"
Holy crap! Is Lewis psychic? Did he hear me back in time, screaming at him that his reasoning is not coherent to me? You might think so, but then you would have to explain why the followup was even less reasonable than the metaphors, and something of a non-sequitur. Granted, if you think really hard you can come up with a satisfactory response that threads all these thoughts together into a coherent chain. I've even done that myself while writing this comment. But at its core, Lewis is arguing something here: that nothing good that comes from people actually comes from people, and that we must thus treat all beneficial things as acts of god. He goes on to hedge this claim with some nice words.
He's like someone in an asylum briefly realizing that he's not actually Napoleon, and then imagining himself on a horse because he likes the idea of it more than being in a padded cell. But yes, there you have it. You can't rely on anything in this world because things break down and shit happens, and therefore you must rely on fiction. Because we all know fiction will get you to where you need to be.
I could go on, if you want, but I think this is getting a bit long for a single comment.