I zealously guard my cognitive time. When I was in high school, I was a very, like I said, successful runner. And I stopped. I stopped at the age of 15, not because I was doing poorly, but because I understood at that age that if I was going to continue to be a good runner, it was going to occupy an outsized place in my imagination and not leave room for other things. And I was not prepared to make that sacrifice. I consider that to be the most important decision I ever made....................
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