I will admit, reluctantly, that I was slightly disappointed in myself at the end of my Half-Marathon. I know, I know... Still, I was, just slightly. I wasn't sure why exactly at the time, but it was really that several things added up to the undermining of my own accomplishment. I still wasn't sure what my personal best was. But now I am. In fact, later that evening I was sure. I've tried to think how to word this, but come up short. The best I've found comes from John Bingham's Marathoning for Mortals book. He says, "You are going to discover your personal best somewhere during the training or during the race. There will come a point when you know that you are accomplishing the most that your body, your mind, and your will have to offer. There will come a point when what you believe about yourself equals what is true about yourself. "That can happen at a 5-minute pace or a 15-minute pace. That convergence of belief and reality can happen to ...