Perseverance has kept me going over the years. Things rarely happen overnight. Filmmakers should be prepared for many years of hard work. The sheer toil can be healthy and exhilarating.

Everyone who makes films has to be an athlete to a certain degree because cinema does not come from abstract academic thinking; it comes from your knees and thighs.

I couldn't roam wildly and speak secretly with villagers [in North Korea]. No way you could do that. And honestly, I didn't even try. I was realistic of what I could do and yet persuaded them into accepting numerous things that I shouldn't have filmed.

Amos Vogel was a mentor, a guiding light for me. In his presence, you always rose. But his importance to me is of minor significance. What is significant is that with him an entire epoch ends. The Last Lion has left us.I am still not capable - or rather unwilling - to understand the fact that Amos passed away, because a man like him cannot be dead. His traces are everywhere.

There are photos of Kim Jong-un right up atop the volcano. I actually wrote a letter to him asking if I could speak on camera. I never got an answer. But what was interesting was the people who were responsible for us, our "guards," it took them two days to figure out how I should address him. "President? No, you can't because there's a president for eternity." And it was a time when his status was still in flux. Only a few months later there was this party congress which assigned an official title to him, but that was after we did our film.

If you don’t have a deal in two days, you won’t have a deal in two years.

We live in an era when established values are no longer valid, when prodigious discoveries are being made every year, when catastrophes of unbelievable proportions occur weekly. In ancient Greek the word “chaos” means “gaping void” or “yawning emptiness.” The most effective response to the chaos in our lives is the creation of new forms of literature, music, poetry, art and cinema.