When he goes inside [the church], he sees the local grocer with rather an oily expression on his face bustling up to offer him one shiny little book containing a liturgy which neither of them understands, and one shabby little book containing corrupt texts of a number of religious lyrics, mostly bad, and in very small print. When he gets to his pew and looks round him he sees just that selection of his neighbours whom he has hitherto avoided. You want to lean pretty heavily on those neighbours. Make his mind flit to and fro between an expression like ‘the body of Christ’ and the actual faces in the next pew. It matters very little, of course, what kind of people that next pew really contains. You may know one of them to be a great warrior on the Enemy’s side. No matter. Your patient, thanks to Our Father Below, is a fool. Provided that any of those neighbours sing out of tune, or have boots that squeak, or double chins, or odd clothes, the patient will quite easily believe that their religion must therefore be somehow ridiculous.

-- C.S. Lewis, The Screwtape Letters