If I were not a writer, I would spend more time doing the things that I am already doing, which include doing research in physics, teaching, and running a nonprofit organization with a mission to empower women in Cambodia.

Where are the one billion people who lived and breathed in the year 1800, only two short centuries ago?

I re-read a lot of books that I like a lot. There are some books that I try to reread every couple of years. A good book changes for you every few years because you are in a different place in your own life.

I value my correspondence with writers...I was in New York and had lunch with Oliver Sachs and compared notes with him - he is someone I really like. I love staying in written correspondence with some writers. That's enough for me.

Sadness is no more than a bit of acid transfixed in the cerebellum.

With infinite life comes an infinite list of relatives. Grandparents never die, nor do great grandparents, great-aunts…and so on, back through the generations, all alive and offering advice. Sons never escape from the shadows of their fathers. Nor do daughters of their mothers. No one ever comes into his own…Such is the cost of immortality. No person is whole. No person is free.

"The Diagnosis" had ten drafts of very significant changing, where I went through the whole book, wholesale and changed everything. Then the last year or so it was making small changes. I would do something and let it sit for three months... just brood about and decide I needed to slightly change something here or there. Or one character wasn't quite right. But I think everybody goes through this.