'You might think of combinatorics as a machine too', the major says. 'A different sort of machine, though. Have you heard of Babbage's analytic engine? He never built it. ... I have an analytic machine of my own-right here.' He taps his own skull.

You are not supposed to get it. It's a paradox. All of mathematics is built on paradoxes. That's the biggest paradox of all-all this orderliness, and at the heart, impossibility. Contradiction. Heaven built on the foundations of hell.

We all spend so much time worrying about the future that the present moment slips right out of our hands. And so all we have left is retrospection and anticipation, retrospection and anticipation. In which case what's left to recall but past anticipation? What's left to anticipate but future retrospection?

Having reached a point in which I was so bitter and exhausted from being a quote unquote public figure, I wanted to return to a more childlike relationship to writing.

In a memoir, I think, the contract implies a certain degree of truth. I think you have to be as true to your memory and your experience as you possibly can.

It is so common to write autobiographical fiction in which your own experience is thinly disguised.

Obviously any fiction is going to be a combination of what is invented, what is overheard, what is experienced, what is experienced by people close to you, what you are told, what you have read, all mixed together into this kind of soup which, like any good soup, at the end you cannot really distinguish the ingredients.