"If part of an organization's draw is that it gives its members license to keep and revel in secrets, then it will inevitably attract members who want even deeper secrets: who are addicted to secrecy, whose addiction can only be fed by having a secret of their own, like being a double agent. That way they can fool even their fellow secret-keepers. "

That's very Le Carré. I've been meaning to read that, now I see your review I must get around to it!