I've always felt that death is the greatest invention of life. I'm sure that life evolved without death at first and found that without death, life didn't work very well because it didn't make room for the young. It didn't know how the world was fifty years ago. It didn't know how the world was twenty years ago. It saw it as it is today, without any preconceptions, and dreamed how it could be based on that. We're not satisfied based on the accomplishment of the last thirty years. We're dissatisfied because the current state didn't live up to their ideals. Without death there would be very little progress.

At first I - I felt that it was confined to my liver and that they had - the operation had completely removed it. And so I felt quite relieved. And then that same afternoon we had an MRI of my head and neck and it showed up that it was already in four places in my brain. So I would say that night and the next day, until I came back up to Emory, I just thought I had a few weeks left. But I was surprisingly at ease. You know, I've had a wonderful life. I've had thousands of friends and I've had an exciting and adventurous and gratifying existence. So I was surprisingly at ease, much more so than my wife was.

But if I was sitting in an armchair with bits and pieces of rubber sticking out of me and my son came over and said, you know, would you like a banana? Wink once for yes, wink twice for no, I dont think the interest of the conversation would get me past the sense that this is horrible. It's horrible for me but above all, horrible for them. There are things worse than death.

The chief side effect of this pain is numbness in the extremities, filling me with the not irrational fear that I shall lose the ability to write. Without that ability, I feel sure in advance, my “will to live” would be hugely attenuated. I often grandly say that writing is not just my living and my livelihood but my very life, and it’s true. Almost like the threatened loss of my voice, which is currently being alleviated by some temporary injections into my vocal folds, I feel my personality and identity dissolving as I contemplate dead hands and the loss of the transmission belts that connect me to writing and thinking.

I saw them recently on their morning walk, and they caused me a pang. I have always wanted a pug and now I can't have one, because buying a puppy when you are too old to take it for walks is unfair. There are dog-walkers, of course; but the best part of owning a dog is walking with it, enjoying its delight when it detects the signs that a walk is imminent, and its glee when its lead is unsnapped and it can bound off over the grass, casting cheerful looks back at you from time to time to make sure that you are still in touch.

I can’t remember when I read, or was told, that he considered it a good thing to spend a short time every day thinking about death, thus getting used to its inevitability and coming to understand that something inevitable is natural and can’t be too bad, but it was in my early teens, and it struck me as a sensible idea. Of course I didn’t set out to think about death in a regular way every day, but I did think about it quite often, and sure enough, it worked. Why coming to see death’s naturalness should have caused belief in an afterlife to melt away, I am unsure, but it did.

The contributor to the programme I remember with the most pleasure is the man who said that not existing for thousands and thousands of years before his birth had never worried him for a moment, so why should going back into non-existence at this death cause him dismay? Everyone laughed when he said that and so did I, and as I laughed I thought: “Dead right!”

That process depends on what you are dying of. The body can fail in ways that are extremely distressing, slowly and painfully, demanding much stoicism, or it can switch off with little more than a flash of dizziness. In my family we seem to have been uncommonly lucky in that respect. There was the 82-year-old uncle who was at a meet of the Norwich Stag Hounds, enjoying a drink with friends, when crash! And he fell off his horse, dead. There was the cousin in her eighties who fell dead as she was filling a kettle to make tea, and the other cousin, 98, who slipped away so gently that the sister who was holding her hand didn’t realise that she had stopped breathing.

That this was true, I owe to Montaigne. I can’t remember when I read, or was told, that he considered it a good thing to spend a short time every day thinking about death, thus getting used to its inevitability and coming to understand that something inevitable is natural and can’t be too bad, but it was in my early teens, and it struck me as a sensible idea. Of course I didn’t set out to think about death in a regular way every day, but I did think about it quite often, and sure enough, it worked.

So, when many years later I really was near death as a result of a haemorrhage after a miscarriage, and heard a doctor saying “She’s very near collapse – call the lab and tell him to run” and understood that the “him” was the person fetching the blood they were going to pump into me, I was not in the least alarmed as I dimly wondered if I had the strength left to think some suitable Last Thought, concluded that I hadn’t, and said to myself the words: “Oh well, if I die I die.” I was sure, then, that nothingness was just that.