The Spy Who Came in from the Cold was the work of a wayward imagination brought to the end of its tether by political disgust and personal confusion. Fifty years on, I don't associate the book with anything that ever happened to me, save for one wordless encounter at London airport when a worn-out, middle-aged military kind of man in a stained raincoat slammed a handful of mixed foreign change on to the bar and in gritty Irish accents ordered himself as much Scotch as it would buy. In that moment, Alec Leamas was born. Or so my memory, not always a reliable informant, tells me.

I happen to write by hand. I don't even type.

It's part of a writer's profession, as it's part of a spy's profession, to prey on the community to which he's attached, to take away information - often in secret - and to translate that into intelligence for his masters, whether it's his readership or his spy masters. And I think that both professions are perhaps rather lonely.

My definition of a decent society is one that first of all takes care of its losers, and protects its weak. What I see in my country, progressively over these years, is that the rich have got richer, the poor have got poorer. The rich have become indifferent through a philosophy of greed, and the poorer have become hopeless because they're not properly cared for. That's actually something that is happening in many Western societies. Your own, I am told, is not free from it.

The longing we have to communicate cleanly and directly with people is always obstructed by qualifications and often with concern about how our messages will be received.

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.

A dead man is the worst enemy alive, I thought. You can't alter his power over you. You can't alter what you love or owe. And it's too late to ask him for his absolution. He has beaten you all ways.