I think walking is a spiritual practice, an ancient spiritual practice for a good reason. There is something about walking that really integrates the body and heart and psyche. I experience sort of a physical shift when I walk. I can literally feel it in sort of the back of my brain at the top of my head. It's as though I go out on a walk worried, and somewhere, maybe 20 minutes into it, I suddenly am in the moment. And I'm not saying that skating or roller-skating or running don't work, but I think that Aborigines and Native Americans go on walkabouts and vision quests for a reason. And also walking is easy—you don't need any special stuff. Anybody can do it, you can do it anyplace, you could do it in the center of Manhattan, you can do it in Los Angeles—although people stare at you when you don't drive your car. You can do it in New Mexico, you can do it Chicago, you can do it in Des Moines.