A loud noise at one end and no sense of responsibility at the other. - Ronald Knox

Words are living things, full of shades of meaning, full of associations; and, what is more, they are apt to change their significance from one generation to the next. The translator who understands his job feels, constantly, like Alice in Wonderland trying to play croquet with flamingoes for mallets and hedgehogs for balls; words are for ever eluding his grasp.

I suppose there has been no subtler attack upon the Christian faith devised by its enemies in these last hundred years than the attack made in the name of "comparative religion". If you pick up a book on "Atonement", and plough your way through ideas of atonement among primitive tribes, pagan ideas of atonement, Jewish ideas of atonement, Christian ideas of atonement, you will find by the end of it that atonement, for the author's mind, has ceased to have any meaning. And he has been successful, in so far as he has managed to infect your mind with the wooliness which is the leading characteristic of his own. Comparative religion is an admirable recipe for making people comparatively religious.

It doesn't do to say that heresy produces the development of doctrine, because that annoys the theologians. But it is true to say that as a matter of history the development of doctrine has been largely a reaction on the Church's part to the attacks of heresy.