Crazy is so hard to play, there's nothing you can really tell an actor.

So with 'There Will Be Blood,' I didn't even really feel like I was adapting a book. I was just desperate to find stuff to write.

I've never been a fan of whimsical or confusing storytelling.

It's so hard to do anything that doesn't owe some kind of debt to what Stanley Kubrick did with music in movies. Inevitably, you're going to end up doing something that he's probably already done before. It always seem like we're falling behind whatever he came up with. "Singin' in the Rain" (1952) in "A Clockwork Orange" (1971) - that was the first time I became so aware of music in movies. So no matter how hard you try to do something new, you're always following behind.

It's a gamble you take, the risk of alienating an audience. But there's a theory - sometimes it's better to confuse them for five minutes than let them get ahead of you for 10 seconds.

You write who you are. But you also cheat, and youwrite what you want to be. It's embarrasing to be the guy who madethe movie, knowing you're not exactly who you want to be.

Acting is the hardest job in the entire world. By far. Harder than ditch digging.