The most reliable metaphor for spying is probably a House of Cards. Little about espionage is solid or permanent. At its core, spying is basically a whole lot of nothing. The case officer here may look impressive, but in truth he knows little of what he pretends to be. One day he’s a nuclear scientist, the next he’s a school teacher. He is neither, of course, and if you examine his house of cards closely, you’ll see it lacks a solid foundation. Some cards are balanced in thin air. The laws of reality have been set aside. His house will not stand for long.