Film is a great tool to play with time, going back and forth through time, or speeding time up and slowing it down and do stuff like that. That's something you can't experience in real life that you can experience on film, and it takes you to a different place.

I was 12 or 13 years old. So I started to write poetry and fiction, even though I was really into biology because my dad was a science teacher. I kept writing all those years.

The only way I know as a director is to figure out what the film is about. And out of the theme and the sense of what the film is about, all those decisions start to make sense. But to find that truth within it, you have to limit your possibilities and limit your choices. That's where this visual language grows out of.

I'm Godless. I've had to make my God, and my God is narrative filmmaking

My god is narrative filmmaking.

I feel that so many sci-fi films and films in general have just become really dependent on and addicted to CGI, and that some of the big CGI films of the summer, you see these effects that look like crap. You don't know if you're watching a cartoon or something that's real. And I didn't want to fall into that trap. I really thought there was a way to use a lot of these old techniques to do some new and really neat stuff.

I don't make films that are easy to market, unfortunately. I think that 'Pi' was the easiest one, because we had that symbol to stick up everywhere, so that was a good gimmick, and created a good mystery, and we didn't have to do huge scale.