"I've always been fascinated by the dark side of human nature. I think it's important to explore that, to understand it, even if it's uncomfortable."

"The only way to deal with the insane is to become insane yourself."

"I'm not interested in making films that are purely entertainment. I want to make films that make people think."

"I never learned anything at all in school and didn't read a book for pleasure until I was 19 years old."

"Everything serious the drill instructor says, such as 'A rifle is only a tool, it is a hard heart that kills', is completely true."