Last week, as I circled the track Running 2 Miles at a pace I thought I couldn't maintain, I had a thought. I had the thought again as I jogged for 2 minutes, and yet again while I ran another 2 miles at that same difficult pace. A few days later, while running 18 miles over the course of nearly 3 hours, I had plenty of time to revisit and contemplate the same thought. All of that thinking led me