Your hand is a warm stone I hold between two words.

Plague has hung over human history. The biggest human extinction was after 1492 in North and South America when the mortality rate was 95 per cent, which is enormous. But again, I'm actually giving you grounds for optimism: There were enough to continue. The five per cent who made it through are what you need to survive a bottleneck, which we have been through before.

That is what you have to do before you kill, I thought. You have to create an it, where none was before.

Our biggest moral debt is to the environment. Take-take-take, nothing given back.

A voice is a human gift; it should be cherished and used, to utter fully human speech as possible. Powerlessness and silence go together.

I particularly like Twitter, because it's short and can be very funny and informative. It's a little bit like having your own radio program.

Keep the faith. Whatever that may be. Don't get too depressed yet, because I have a belief in America being very diverse and ornery, and containing a lot of people who are not going to roll over very easily for a totalitarian dictatorship. That is what I think.