Recently I was invited to give a special lecture at the university where I teach. I accepted the invitation though, contrary to what my sons might tell you, I don’t really like to lecture. For one thing, I’m not good at it. Also the concept of a lecture suggests to me that the speaker intends to deliver from on high some absolute Truth, with a capital T, and that does not interest me.

But this lecture was different. It would be part of a series inspired by Randy Pausch’s book The Last Lecture. Pausch was a computer-science professor at Carnegie Mellon University who, while facing a terminal diagnosis, spoke directly to his students and colleagues about the things that matter most.