Some readers read a book as if it were an instruction manual, expecting to understand everything first time, but of course when you write, you put into every sentence an overflow of meaning, and you create in every sentence as many resonances and double meanings and ambiguities as you can possibly pack in there, so that people can read it again and get something new each time.

When I was thin, I had no notion of what being fat is like. When I worked in a department store, I had sold clothes to women of most sizes, so I should have known; but perhaps you have to experience the state from the inside, to understand what fat is like.

He once thought it himself, that he might die with grief: for his wife, his daughters, his sisters, his father and master the cardinal. But pulse, obdurate, keeps its rhythm. You think you cannot keep breathing, but your ribcage has other ideas, rising and falling, emitting sighs. You must thrive in spite of yourself; and so that you may do it, God takes out your heart of flesh, and gives you a heart of stone.

The weight of the old world is stifling, and trying to shovel its weight off your life is tiring just to think about. The constant shuttling of opinions is tiring, and the shuffling of papers across desks, the chopping of logic and the trimming of attitudes. There must, somewhere, be a simpler, more violent world.

I'm a very organised and rational and linear thinker and you have to stop all that to write a novel.

[Margaret Thatcher] aroused such strong loathing in so many people. That's the fact that interests me.

In my 20s I was in constant pain from undiagnosed endometriosis. With no prospect of a cure, I decided I needed a career - writing - that could accommodate being ill.