"I think that if I were asked to single out one specific group of men, one type, one category, as being the most suspicious, unbelieving, unreasonable , petty, inhuman, sadistic, double-crossing set of bastards in any language, I would say without any hesitation: "the people who run counter-espionage departments." With them, it is no use having just one story; and especially not a true story; they automatically disbelieve that. What you must have is a series of stories, so that when they knock the first one down you can bring out the second, and then when they scrub that out, come up with a third. That way they think they are making progress and keep their hands off you, while you gradually find out the story they really want you to tell."