I like the idea of the adventurer's spirit. I think that is very much what a man searches for, in a certain way.

I think also what's interesting is that Maggie [Gyllenhaal] knows how much the choices that I make reflect what's going on in my life. Admittedly, probably, as my sister, and as someone who loves me - like, she can't wait to see become a father.

My experience on 'Jarhead' was life changing.

To me Donnie Darko was about adolescence. And about how, as soon as you start to grow up and you sort of move out into the world, you realize everything is so trippy. That anything can be anything.

I could draw ideas. I remember writing a paper for a seminar class. I remember writing a paper about - and this is going to sound really sort of pretentious, but that's where my mind was at the time - how acting and the performing artist can really be like a Bodhisattva, how they can communicate ultimately an idea in a way that can move and shift things. And that was wonderful. I didn't know many classes where I could try and relate the thing that I really loved and wanted to do into an intellectual idea, and that happened to be one of them.

I think, in the initial process of discovering a character and the analytical process - and this is what I did take from Buddhism - initially I think there has to be an analytical, intellectual approach. And that has to be abandoned by the time you're playing the game.

As Uta Hagen would say, there's the representational actor and the presentational actor. My sister [Maggie Gyllenhaal] came up to me recently after she saw this movie, Southpaw, the movie I did, and she thought there was this exploration of that type of presentation, and a bit of representation as well, if I could be totally honest, where she was deeply moved.