Basically, I think 21st century conservation is moving toward preserving ecosystems by dealing with the needs of people.

If two people are at completely different stages in their spiritual life, that can present a real problem.

A lot of people ask, "What do you pull on in your own life from your character?" In all honesty, it's not something that really works that way for me. I tend to look at these things as an imaginative process and a challenge of imagination and empathy, to some degree. I get much more out of meeting people who have lived these lives than I do digging around in my own limited experiences.

I've observed over and over that people seem to get a much deeper sense of fulfillment out of something they've done as an act of service than out of the things they do for themselves.

But look at Avatar (2009), one of the most globally viewed pieces of entertainment to have ever been made - the central emotional event of the whole movie was a tree being cut down. And the entire movie, essentially, is saying, "If we let the military industrial complex trash the place that we're living in, we will have committed an epic crime."

Remarkably, there's no green screen in 'Leaves of Grass' movie. There is motion control. Technically, there were all sorts of challenges, but really the soul of it is Edward Norton talent. You write these characters when you write a movie, and all you can hope for or depend on is that your actors will elevate the material.

I've always thought of acting as more of an exercise in empathy, which is not to be confused with sympathy. You're trying to get inside a certain emotional reality or motivational reality and try to figure out what that's about so you can represent it.