“I have a theory which I suspect is rather immoral,' Smiley went on, more lightly. 'Each of us has only a quantum of compassion. That if we lavish our concern on every stray cat, we never get to the centre of things.”

“There's no way out," he announced with satisfaction, "and no amount of wishful dreaming will produce one. The demon won't go back in its bottle, the face-off is for ever, the embrace gets tighter and the toys cleverer with every generation, and there's no such thing for either side as enough security. Not for the main players, not for the nasty little newcomers who each year run themselves up a suitcase bomb and join the club. We get tired of believing that, because we're human. We may even con ourselves into believing the threat has gone away. It never will. Never, never, never.""So, who'll save us then, Walt?" Barley asked. "You and Nedsky?""Vanity, if anything will, which I doubt," Walter retorted. "No leader wants to go down in history as the ass who destroyed his country in an afternoon. And funk, I suppose. Most of our gallant politicians do have a narcissistic objection to suicide, thank God.”

“Our power knows no limits, yet we cannot find food for a starving child, or a home for a refugee. Our knowledge is without measure and we build the weapons that will destroy us. We live on the edge of ourselves, terrified of the darkness within. We have harmed, corrupted and ruined, we have made mistakes and deceived.”

“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.”

“No country was ever easier to spy on, Tom, no nation so open-hearted with its secrets, so quick to air them, confide them, or consign them too early to the junk heap of planned American obsolescence. I am too young to know whether there was a time when Americans were able to restrain their admirable passion to communicate, but I doubt it. Certainly the path has been downhill since 1945, for it was quickly apparent that information which ten years ago would have cost Axl's service thousands of dollars in precious hard currency could by the mid-70s be had for a few coppers from the Washington Post. We could have resented this sometimes, if we had smaller natures, for there are few things more vexing in the spy world than landing a scoop for Prague and London one week, only to read the same material in Aviation Weekly the next. But we did not complain. In the great fruit garden of American technology, there were pickings enough for everyone and none of us need ever want for anything again.”

“Sometimes we have to do a thing in order to find out the reason for it. Sometimes our actions are questions, not answers.”

“Perhaps we didn't win anyway. (the Cold War) Perhaps they just lost. Or perhaps, without the bonds of ideological conflict to restrain us any more, our troubles are just beginning.”