Treason is very much a matter of habit, Smiley decided. - John le Carré

Survival...is an infinite capacity for suspicion.

It's the oldest question of all, George. Who can spy on the spies?

Martindale had no valid claim on Smiley either professionally or socially. He worked on the fleshy side of the Foreign Office and his job consisted of lunching visiting dignitaries whom no one else would have entertained in his woodshed. He was a floating bachelor with a grey mane and that nimbleness which only fat men have.