" We were wondering, you see,’ he said in a faraway voice, ‘whether you’d ever considered signing up with us on a more regular basis? People who have worked on the outside for us don’t always fit well on the inside. But in your case, we think you might. We don’t pay a lot, and careers tend to be interrupted. But we do feel it’s an important job, as long as one cares about the end, and not too much about the means. "

― John le Carré , A Legacy of Spies