“Jesus Christ only had twelve, you know, and one of them was a double.”

“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.”

“I once heard someone say morality was method. Do you hold with that? I suppose you wouldn't. You would say that morality was vested in the aim, I expect. Difficult to know what one's aims are, that's the trouble, specially if you're British.”

“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.”

“What would it be like really and absolutely to believe? (...) To know, really and absolutely know, that there's a Divine Being not set in time or space who reads your thoughts better than you ever did, and probably before you even have them? To believe that God sends you to war, God bends the path of bullets, decides which of his children will die, or have their legs blown off, or make a few hundred million on Wall Street, depending on today's Grand Design? (ch. 14)”

“The crowd is bobbing round him and he is part of it, the free people of the earth have taken him among them. He is one with all these grown-up happy children celebrating their independence of things that never held them.”

“Waking and sleeping she had demanded to know where she belonged in a white man's world, and how and where she should invest her ambition and her humanity”