“The other day, I had a thought about something, and as is now my reflex, I reached for my phone to tweet it. And I don’t know what stopped me – maybe I was heading down into a subway station or something – but for some reason, I stopped. I thought: this thought will have to stay inside my head, unexpressed. A feeling of calm washed over me. It was the first time I’d done that since late 2006.”
