“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.”

“Ideologies have no heart of their own. They're the whores and angels of our striving selves.”

“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.”

“Look... we're getting to be old men, and we've spent our lives looking for the weaknesses in one another's systems. I can see through Eastern values just as you can see through our Western ones. Both of us, I am sure, have experienced ad nauseam the technical satisfactions of this wretched war. But now your own side is going to shoot you. Don't you think it's time to recognise that there is as little worth on your side as there is on mine?”

“Perhaps it was the 'sir's' that turned the trick. At their first meeting it was Mr. Woodrow, or when they felt bold, Sandy. Now it was sir, advising Woodrow that these two junior police officers were not his colleagues, not his friends, but lower-class outsiders poking their noses into the exclusive club that had given him standing and protection these seventeen years.”

“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.”

“Coming home from very lonely places, all of us go a little mad: whether from great personal success, or just an all-night drive, we are the sole survivors of a world no one else has ever seen.”