Have regrets. They are fuel. On the page they flare into desire.

The thing that strikes me, from looking at the names so far in the Donald Trump's Cabinet on the foreign policy side, is the one thing that unites them - and that's General James Mattis at the Pentagon, Mike Pompeo at the CIA, even Mitt Romney to become secretary of state - they're all very, very hawkish on Iran.

All sorts of things can keep one awake. But as you get older - this is what the stroke thing really brought home to me - this thing that I never paid attention to: my brain. I've always been conscious that, of course, after a night of getting stoned, my head would feel foggy; if I got drunk the night before I'd be hungover. But that was the extent of my concern about my brain. And then with the stroke thing, it made me realize, "God! That's my main source of income." So it relates actually to your other question about growing old.

The perfect life, the perfect lie, I realised after Christmas, is one which prevents you from doing that which you would ideally have done (painted, say, or written unpublishable poetry) but which, in fact, you have no wish to do. People need to feel that they have been thwarted by circumstances from pursuing the life which, had they led it, they would not have wanted; whereas the life they really want is precisely a compound of all those thwarting circumstances.

Each of my book arrives at a form and a style that is appropriate to the subject.

If Donald Trump thinks that just by being unpredictable that somehow he can have an impact, but not necessarily commit himself to certain things, that's not the way it is going to be read in foreign capitals. Foreign governments are going to take these things very literally and very directly.

Quite often, ambition operates on a level of irritation. Not even jealousy, just irritation.