We're fascinated by things that scare us, and one of the things that scares us is violence. Violence exists. It's a real part of our lives. We are obsessed with what we're scared of, but it certainly doesn't define us.

Nightmares are a strange thing. Your worst fear is sometimes something you enjoy thinking about, for some strange reason. I don't know why that is, but it's some kind of fantasy that people play out. "What would I do to protect my children? I'd do anything." And then, you watch it play out. I'm petrified of such a thing.

It's interesting to get older and realize that part of your job growing up in this profession is to help the next generation. More and more, with Boyhood and with Ellar Coltrane and with Emma [Watson], I start to see that role. There's no better way. Nobody wants advice, so you can't really give it. You just have to try to wish them well on their journey.

I remember staying up all night waiting to see the first screening of Cape Fear because you knew that every time Robert DeNiro had a performance it was going to be revelatory. Then DeNiro hit this place, he seemed like he was done with the emotional cost of impaling himself like that, and he dedicated himself to comedy.

I think it's my job to risk looking foolish. One of the things I've learned from the actors I've worked with is you don't get something for nothing. If you don't risk looking foolish, you'll never do anything special.

I don't think Emma Watson needs any advice. She's an incredibly smart young woman who knows what she wants out of life and she has some great parents.

My relationship to reality has been so utterly skewed for so long that I don't even notice it any more. It's just my reality.