I was out for a ten-miler over the weekend and it struck me how similar a half-marathon is to a recital. In both, the hardest part is at the very end, and in both, it's hard to prepare for that part. The first half hour of running is pretty easy, and then I cruise for a while, but after nine miles it gets difficult. My legs are heavy and while I'm not in pain, exactly, I do want to stop running and walk. Everything is uncomfortable. In the same way, the opening few pieces on a recital feel effortless. I am riding on my preparation, and showing off for the audience, and even if the performance is not flawless it is energetic and feels great. But then things start to change. My mouth gets tired, which makes my reed feel different. Harder, more brittle. Maybe the reed actually is different by that time - it's tricky to know. My playing doesn't feel so effortless anymore, and when I make mistakes I can't brush them off as easily. I perceive that everyone can see...