The attitude described in that quotation from C S Lewis seems to me (and, I'd guess, to a large majority of LW regulars) very, very, very broken. And perhaps entirely incoherent: how can you accept some things and reject others, while simultaneously not wasting time thinking about what you reject and accepting humbly and uncommentingly what you accept? If you can do that at all, it seems to me that it would have to be by (1) thinking about what you're hearing, (2) throwing away all the products of that thought other than a binary "accept/reject" distinction, (3) accepting or rejecting, and (4) forgetting about the thinking you did in step 1. Ouch.