Playing in front of an audience was just such a turn-on for me, and you have 200 people in the audience and it's like doing live theater. And filming something that goes to millions of people several weeks later, it's an interesting dynamic.
Our empirical criterion for a series of theories is that it should produce new facts. The idea of growth and the concept of empirical character are soldered into one.
I must have done everything I had. You go through years where you go through everything you've ever written.