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.

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.

The most difficult thing about painting is the self-discipline. When I finish a job, I give myself a few days, but then I have to discipline myself quite fiercely if I want to do some painting that's worthwhile. Otherwise, you're just doodling. It's much easier when you're just told what you have to do.

I am not an enormous believer in research being the be-all and end-all. I get suspicious when I read about actors spending six months in a clinic, say, in order to play someone who is sick.

I loathed school. I don't have an academic mind, and besides I was so bored by my teachers! How teachers can take a child's inventiveness and say yes, yes, in that pontifical way of theirs, and smother everything!

A very, very impressive director, Tomas Alfredson. It's only his second film [ 'Tinker Tailor Soldier Spy'], but he's a real find.

The director [Elfar Adalsteins] came to me through my agent and I had a read of the script [of the "Sailcloth]. I thought immediately this is someone who is writing for the cinema. Not having to go through the tedious business of taking something from literature and making that awful leap that is so difficult to make anyway, from literature to cinema. It's refreshing to be able to deal with a subject like that, to be written where the driving force is the image on screen and you don't need any words. The more that we can do that [in film], the better.