The Archbishop and the devil

I was listening to ++Rowan on the radio this evening (actually it was a recording from yesterday, I think) talking about Dostoyevsky. Seems the good Archbishop has written a book on the subject, just to keep his mind off the church. What struck me was how different he sounded from the person I've heard trying to explain some theological point for the masses or to defend the Anglican Communion against the onslaughts of the press. This Rowan Williams sounded relaxed, confident, fluent - and a joy to listen to.

What do we do to people when we make them archbishops, bishops, whatever? Seems to me that anyone in the hot seat is bound to be castrated by the position - that they have to put their intellect on hold or use it to wriggle out of answering crass questions or to craft ever more byzantine compromises.

One point which arose from the discussion itself concerned the function of evil in the world. Dostoyevsky's devil apparently claims (I haven't read any Dostoyevsky) that without him - ie without evil - the world would cease to exist. I didn't find ++Rowan's explanation of this convincing or particularly lucid: anyone like to enlarge on the topic?