The art of making a film and its content are far more interesting to me than the result or impact.

Never revisit the past, that's dangerous. You know, move on.

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.

If we want energy security, then we have to reduce our appetite for fossil fuels. There's no other way. Other issues may crowd the headlines, but this is our fundamental challenge. Big challenges require bold action and leadership. To get the United States off fossil fuels in this uneasy national climate of terrorism and conflict in the Persian Gulf, we must treat the issue with the urgence and persistance it deserves. The measure of our success will be the condition on which we leave the world for the next generation.

I guess there are different ways to handle success. You can multiply it financially and use it to multiply your net worth. That's always been very appealing to me.

Like all actors, I was open to taking on new challenges, including those outside my comfort zone.

I don't think about when it's going to stop and what you do before it stops. You just keep moving.