My work is very controlled. I leave nothing to chance. Chance comes afterward... Making a film is like cooking a pot au feu. You choose the best carrots, the best potatoes the best meat, etc., and you throw all that together - but if there's no soul, so to speak, it won't yield much.

It's the comedies and thrillers that are successful. People love horror, but in thrillers. Once you speak of pain and suffering it's a different matter.

I think about the sincerity of my writing. I try to be true, to pose questions. Shake people up a bit and make them look in a direction they wouldn't normally.

I like speed in thrillers. It's a rhythm adapted to the subject.

It's always been difficult for me to speak and express my innermost thoughts. I prefer to write. When I sit down and write, words grow very docile, they come and feed out of my hand like little birds, and I can do almost what I want with them; whereas when I try to marshal them in open air, they fly away from me.

In a novel, language is your principal tool, you try to build pictures in the mind of the reader. When you write a screenplay, the language is just a transition, the final goal is a picture on the screen, it's the only thing the audience sees.

Most of all people respond to a film tackling grave subjects that question and go against the prevailing mood.