In the States it's more and more difficult to get an independent film off the ground, and you certainly wont get the opportunity to play something like that in a studio movie.

The common misconception is that we create films for ourselves. And I really don't do it for myself. I get stopped in the street by people saying, "Do you mind if I say this about your work?" Do I mind? I'm delighted. I do it for you. It's not for me. It's my living, yes, sure.

By the time I came to do the final ones [Harry Potter's film], I was working on something that was massively successful. There was a huge difference in indulgence and all sorts of stuff. A very big difference in peoples' attitudes. They were very pleased with themselves. In human terms, it was quite interesting to see the difference.

Bong Joon-ho is enormously sensitive to performance. He knows what he needs to see and that's all he needs to shoot. He is so daring. We don't do that in the west. We shoot everything.

One wonders sometimes, looking at the world, how it's dealing with itself. There are days when you wake up and you feel very optimistic and there are days when you feel pessimistic.

You have to learn to cut your cloth accordingly. But it seems to be a human weakness. Once you start making a lot of money, you just join in with everyone else. It's like the banks, and we've seen what happens there.

What I like about [Berthold] Brecht, it's very interesting. When Helene Weigel came over and somebody talked about Lotte Lenya and said "well, she wasn't alienating." And Weigel said "No, no, no. Why, Lotte Lenya was so true - who cares?" She said: "Berti only developed the theory of alienation in order to stop bad acting." I heard her say that. Now that's brilliant.