'Beware of the argument "the church gave the Bible (and therefore the Bible can never give us grounds for criticising the Church)'. It is perfectly possible to accept B on the authority of A and yet regard B as a higher authority than A. It happens when I recommend a book to a pupil. I first sent him to the book, but, having gone to it, he knows (for I've told him) that the author knows more about the subject than I.'
CS Lewis in Walter Hooper (Ed.) in The Collected Letters of CS Lewis Vol III, p.1307.