“To judge the performance of a skier, there is a chronometer. If he is above it, it’s the end. If he’s under, it’s fab—he wins. When you make a film, it’s as though each person was going to watch it with their own chronometer. Everyone becomes critical of the movie, including your mother, your sister, the baker...When the audience comes out of your film with a big smile, you say to yourself, that’s why you are in this trade.”