I find it interesting that there are impostors out on the Internet pretending to be Werner Herzog.

Your film is like your children. You might want a child with certain qualities, but you are never going to get the exact specification right. The film has a privilege to live its own life and develop its own character. To suppress this is dangerous. It is an approach that works the other way too: sometimes the footage has amazing qualities that you did not expect.

I must say, the people who started this whole Masterclass series have been very helpful and very intelligent to point out certain things and also give me some guidance, "isn't there something missing, shouldn't we address this or that?" so it's not completely alone out of the blue. It's very well thought through.

There are certainly laws and elements that make a film more accessible to mainstream audiences. If you've got Tom Cruise as a strongman, I'm sure it would have larger audiences, but it wouldn't have the same substance.

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.

This is the birth of the modern human soul. The artists are like us, not like the Neanderthals, who had no culture - and who incidentally were still roaming the landscape at the time the paintings were made. It is striking that there is a distant cultural echo that seems to reach all the way down to us, over dozens of millennia.

We have to articulate ourselves. Otherwise we would be cows in the field.