Elephant Man [movie] was much more difficult physically. This had a couple of days. It was quite tricky. I had my leg strapped up behind me and I am a little older now. It was all marvelous, though. He [Bong Joon-ho] is one of the most fabulous directors in the world.

When you're really working well with a director then you can be as outrageous as you like and so can he. And there's no worry about it.

Once you've started to dig a hole, you can't get out of it.

Society is constantly recalibrating, redefining what it considers to be moral and immoral.

Developing characters is a collective process, on one hand; it's an individual process on the other. The truth is rarely pure and never simple, as dear Oscar Wilde would say. A great of it, of course, is, you collect as much information as you can and then you put it into the mulberry of your mind and hope that you come up with a decent wine. Sometimes you do; sometimes you don't.

I think you can get better in mathematics on a school level, but when you're talking about being a mathematician, I think that's definitely a gift of genes or whatever.

I'd say the film to avoid is a director's second film, particularly if his first film was a big success. The second film is where you've really needed to have learned something.