Like any job, there are days as a teacher when I wonder if I am just wasting my time. Then there are days like today, when I say goodbye to a class of seniors who remind me through their character, intelligence, and grace why I keep coming back. In the tradition I started several years ago, my seniors ended their year by delivering ten minute long commencement speeches. Every year, I write one as well. Here is this year's. This is the last time I will see you before you walk out onto that field Monday evening for a ceremony that recognizes not just your completion of four years of school, but the completion of the first phase of your life. While I am sure there is some sadness and maybe some anxiety, I hope there is also powerful mix of pride, expectation, and joy as you walk together out to that field. I hope you see in that ceremony the promise a future entirely of your own making. Others have run your life up to this point. Not anymore. Based on average life spans, yo...