>>#1. I have never officially "joined" a church and I don't think I ever will (but I can't say never. That's just asking for it I think). I side with Lewis on this, in that if I join a church as an official member then I not only am bound to agree with what they are doing now, but also what they will do in the future. I take that very seriously and so am very wary of binding myself to that which I have no control over. <<
IIRR (and I don't have the books to hand) when Lewis said that he was specifically talking about the Roman Catholic doctrine of Papal Infallibility as one reason he wasn't a Roman Catholic, rather than about churches in general.