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.

Always say no pun intended to draw attention to the intended pun.

Not explicitly, no. Compared to this enormous, relentless evolutionary activity in the built environment, writing is small potatoes.

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.

Note-taking is important to me: a week's worth of reading notes (or "thoughts I had in the shower" notes) is cumulatively more interesting than anything I might be able to come up with on a single given day.

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.

Echo is very important to me. I love the repetition of motifs, or the slight alteration of what's been said before. This is part of how one creates a mood, a psychological caul, in fact, around the reader.