Anybody that makes films knows the film is never finished. It's abandoned or it's ripped out of your hands, and it's thrown into the marketplace, never finished. It's a very rare experience where you find a filmmaker who says, "That's exactly what I wanted. I got everything I needed. I made it just perfect. I'm going to put it out there."

The sciences are the 'how,' and the humanities are the 'why' - why are we here, why do we believe in the things we believe in. I don't think you can have the 'how' without the 'why.'

One thing about 'Star Wars' that I'm really proud of is that it expands the imagination. That's why I like the 'Star Wars' toys.

The secret is not to give up hope. It's very hard not to because if you're really doing something worthwhile I think you will be pushed to the brink of hopelessness before you come through the other side.

I'm not much of a math and science guy. I spent most of my time in school daydreaming and managed to turn it into a living. When I was making "Star Wars," I wasn't restrained by any kind of science. I simply said, "I'm going to create a world that's fun and interesting, makes sense, and seems to have a reality to it."

I felt that one of the major issues in the third film is that Luke is finally on his own and has to fight Vader and the Emperor by himself. If you get a sense that Yoda or Ben is there to help him or to somehow influence him, it diminishes the power of the scene.

You try to get yourself into a situation where you only have to answer to yourself, where you can ask advice of people and work with your peers and mentors and things to try to do the best job that you can possibly do.