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

“Sometimes you do it to save face, thought Jerry, other times you just do it because you haven't done your job unless you've scared yourself to death. Other times again, you go in order to remind yourself that survival is a fluke. But mostly you go because the others go; for machismo; and because in order to belong you must share.”

“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.”

“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.”

“We lie to one another every day, in the sweetest way, often unconsciously. We dress ourselves and compose ourselves in order to present ourselves to one another.”

“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.”

“This is a war," Lemas replied. "It's graphic and unpleasant because it's fought on a tiny scale, at close range; fought with a wastage of innocent life sometimes, I admit. But it's nothing, nothing at all besides other wars - the last or the next.”