All of a sudden it's twelve-year-olds who are contacting me, fifteen-year-olds, and they have very, very fascinating questions. However, they speak in a language of their age group which I have to learn first.

If you’re purely after facts, please buy yourself the phone directory of Manhattan. It has four million times correct facts. But it doesn’t illuminate.

You also can understand how to play tennis from Serena Williams, and she is awesome. I haven't seen her Masterclass but just watching her on the court - I saw some of Wimbledon on TV and there's such an awesome force in her and focus and determination and technique, you just look at her and it's awesome. If I would like to learn tennis I would immediately turn to her.

I wouldn't make a connection between the daily news and volcanoes.

In the communist revolution in North Korea, when they threw out the Japanese occupiers, they claimed the power in the dynamic of this volcano for their revolution, saying that this is at the center of the dynamics of our revolution. Everything that you encounter - you don't have, for example, any advertisements, you don't have anything like that anywhere in the country - if you see anything it would be propaganda, and propaganda always inevitably comes back to the volcano. It's always including the volcano. You see the new leader and standing behind him you see the volcano.

For example, how you would introduce a leading character into your film, and as an absolute ingenious example, [Elia] Kazan in his film Viva Zapata!, how he introduces his leading character Marlon Brando into the film. No film ever did it as wonderful as he did it.

[ Digital revolution ] only has allowed me to work faster, editing digitally, which I'm doing right now, a film on volcanoes. I can edit almost as fast as I'm thinking, editing with celluloid means always searching for this little reel of film, and number it, and scribble on it with some sort of pens, and gluing it together, and working on a flatbed. It's much, much slower.