What he says, even on his knees, about his own sinfulness is all parrot talk. At bottom, he still believes he has run up a very favorable credit-balance in the Enemy's ledger by allowing himself to be converted, and thinks that he is showing great humility and condescension in going to church with these 'smug', commonplace neighbors at all.

The Screwtape Letters & Screwtape Proposes a Toast (ed. 1961)