It's a passion when you're doing it for other people and you're doing it for the people around you making the film and the people who are going to see the film, and the giving. When you start thinking about you doing it for some sort of self-gain, then I think it becomes an obsession. It becomes a negative experience.
Stanley KubrickThe director's job is to know what emotional statement he wants a character to convey in his scene or his line, and to exercise taste and judgment in helping the actor give his best possible performance.
Stanley Kubrick