I've always relied on discipline to achieve goals great and small. At a young age, my father instilled a real work ethic in me - and a fear of men. I always felt like if I didn't have a natural knack for something, I could kind of out-discipline the competition as it were. So I would always work as hard as I possibly could, sometimes to my own detriment and my personal life. For me, I think will power and discipline are very synonymous.

I don't know if you've ever had insomnia, but it's a really terrible feeling when it's days and weeks on end. It was kind of awful.

The fact that you're friends doesn't necessarily equate to great chemistry.

Marathon running, for me, was the most controlled test of mettle that I could ever think of. It's you against Darwin.

Honestly, I think it's dumb luck that I'm able to kind of get away doing different types of films in different genres. There's always a tendency to kind of stick with what works, or stick with one particular kind of brand or movie. But so far I've been getting away with it, so I'm going to continue to do that for as long as I can.

When I meet thousands of fans of the comic - when I realize every one of them can recite the Lantern Corps oath ('In Brightest Day, in blackest night...') - I know how important this is to people.

Four months after we finished shooting, I'd been in New Orleans shooting another movie and my agent and I were having a bite to eat - actually in London - and he's sitting there and goes, 'Wow, I just can't believe how ripped you are.'