Filming typically takes a bit away from the climbing experience, since you have to stop all the time and shoot.
I feel that a lot of human spirituality stems from the belief that we are unique and special in the universe, but maybe we are just what happens when there is proper temperature and proper distance from the right type of star.
There's a constant tension in climbing, and really all exploration, between pushing yourself into the unknown but trying not to push too far. The best any of us can do is to tread that line carefully.
Seven years ago, when I started free soloing long, hard routes in Yosemite - climbing without a rope, gear or a partner - I did it because it seemed like the purest, most elegant way to scale big walls. Climbing, especially soloing, felt like a grand adventure, but I never dreamed it could be a profession.
There's only a handful of chicks in the world who can climb big walls on my level.
Yosemite has the most impressive and accessible granite big walls in the world. The rock is amazing. And because of that, it's been the mecca for climbing in the U.S. - and the world to a large degree - for all of climbing history. It's the place to test yourself against the historic routes of the past.
The thing with physical preparation is I have tons of friends who train at a really high level and who can give me advice. But with mental training, I don't really know anybody who has a much better mind for climbing, I guess, so I don't really know where I would go. It's not really a limiting factor for me.