If we try to define our own moral universe, there's a price for that.

A lot of my shows in the past have been more theatrical than others, but you really get the bug for it when you direct on stage.

I feel like casting is the most important aspect of making movies.

I've consciously taken on material that's a bit too much for me but not an overreach. The first movie, just about performances. 'The Town,' I learned how to work broader material, develop tension, direct bigger scenes, action sequences. 'Argo,' I experimented with film stock, widened the scope of my geography.

We wanted to show people what it was like in one of those neighbourhoods that they would never have access to, in bars that they would be too scared to go into, and a world that they would never get to see. All of that is something really unusual and rare and kind of fascinating. And the only way to do that and to make it really worthwhile was that it had to be authentic. We dedicated a lot of time and energy to making that right and real. So we found basically the worst locations that we could.

Sure, I suffered a lot. But it's not like the end of the world and it's not who I am. I lead quite a pleasant life and I'm able to divorce a perceived reality from my actual experience of life.

One of the differences between now and then is that the idea of body image is a much bigger issue now. Back then, just being kind of heavy and barrel-chested passed for heroic. Now, you wouldn't dare to play a hero without a lot of dieting and various specialised abdomen machines. But that was one of the things which was interesting about it and I did want to portray because there's good and bad.