Usually, when making a film, the surprises are negative surprises. You don't get what you wanted or what you hoped for. The only nice surprises are those that are offered to you by actors when they offer you these gifts, when they are better and give you more than what you had originally conceived. That doesn't happen every day on set, but if it happens a couple of times in the course of making a film, you can consider yourself very lucky.

I'm far more relaxed with German. I'm a control freak. I like to know exactly who's saying and doing what.

And if there was one title that could be applied to all my films, it would be 'Civil War' - not civil war in the way we know it, but the daily war that goes on between us all.

As a private person, professionally I am invisible.

People expect me to be dark and gloomy, then write that I'm a jolly chap, and after all, that is what I am. I think it's a case of an absolute romantic naivety that there should be a parallel between the work and the artist.

If someone's lying to us, then it's rare that we know that they're lying to us. It's only in bad films that you recognize immediately that an actor's playing in such a way that you can see that he's lying, and that's simply dumb. But to reach that, it requires that you make a film in such a way that a spectator feels compelled to find his own explanation. You want to lead the spectator to find his own interpretation. To ask questions rather than provide all of the answers. Doing that leads to open endings and open dramaturgy.

It's unbearable when someone changes around you. Just imagine that your life partner changes, then it is difficult to cope with. Or your mother. Or your father. They were strong and now they're like a baby - it's not so funny.