I became aware of just how fleeting the sense of happiness was, and how flimsy its basis: a warm restaurant after having come in from the rain, the smell of food and wine, interesting conversation, daylight falling weakly on the polished cherrywood of the tables. It took so little to move the mood from one level to another, as one might push pieces on a chessboard. Even to be aware of this, in the midst of a happy moment, was to push one of those pieces, and to become slightly less happy.

What's interesting about Twitter is the unmediatedness of it, the directness of it. I'm on a train somewhere in New York and I send out a tweet. Somebody sitting at dinner in Bombay checks their phone and they see it.

The content of Saul Leiter's photographs arrives on a sort of delay: it takes a moment after the first glance to know what the picture is about. You don't so much see the image as let it dissolve into your consciousness, like a tablet in a glass of water.

Joyce's writing in Dubliners contains some of the most unshowily beautiful sentences in the English language. I learned from him that if you write a good, clean line of English, you can get under a reader's skin. The reader won't even know why, but there you are. Didion, Berger, the many others I mentioned above, and many, many poets I haven't mentioned. Writers of this calibre are the moving targets the rest of us are always chasing.

But a book suggests conversation: one person is speaking to another, and audible sound is, or should be, natural to that exchange. So I read aloud with myself as the audience, and gave voice to another's words.

I deeply respect American sentimentality, the way one respects a wounded hippo. You must keep an eye on it, for you know it is deadly.

I'm not hopeful about America, and I'm not hopeful about the world, no. Life goes on and, for those of us who are lucky, there's a great deal to enjoy in it. But will things get better for most people? I don't know. I don't see the evidence.