There's that bubble of childhood that makes you innocently do anything. Then, when you get older, that pops, and you're aware of limitations and judgment and social pressures and things like that.

It's really, always, the story and the characters that come first, and the other things are kind of dealt with in time or, in fact, driven by the story.

With sadness specifically, in America you read about people medicating to avoid sadness. They don't want to experience sadness, and yet it's such a vital part of being human.

It's like you run into this dark tunnel, trusting that somewhere there's another end to it where you're going to come out. And there's a point in the middle where it's just dark. There's no light from where you came in and there's no light at the other end; all you can do is keep running. And then you start to see a little light, and a little more light, and then, bam! You're out in the sun.