San Franciscans are very proud of their city, and they should be. It’s the most beautiful place in the world.

What really matters is the work. And what matters to me is doing the work. I'm not looking at the back end: "What am I going to get out of this? What's going to be the reward?" I'm just looking at the work, the pleasure of being able to do the work. And that's what the fun is: To climb up the mountain is the fun, not standing at the top. There's nowhere to go. But climbing up, that struggle, that to me is where the fun is. That to me is the thrill. But once that's over, that's kind of it. I don't look too much beyond that.

There's a lot of money to be made by strip-mining and drilling the dirtiest oil on the planet. But why should the rest of us pay the price?

I have a lot of land. I bought it because I had a very strong feeling. I was in my early twenties, and I had grown up in Los Angeles and had seen that city slide off into the sea from the city I knew as a little kid. It lost its identity - suddenly there was cement everywhere and the green was gone and the air was bad - and I wanted out.

I think you just keep going. I've been that way, my whole life.

If you can do more, you should.

I didn’t want the attacks to affect me. I don’t believe you should be led by fear.