Stephen Colbert, who graduated from Northwestern in 1986 (technically with an incomplete — the dean had handed him a note on a piece of legal pad instead of a diploma), returned 25 years later to deliver the commencement address. Drawing on his training in improvisational comedy, he explained a fundamental rule of improv: you are not the most important person in the scene — everybody else is. If everyone treats everyone else as the most important person, then naturally you all pay attention to and serve each other. 'No one is leading, you're all following the follower, serving the servant.' He extended this to life itself: it's an improvisation where you have no idea what's going to happen next and are mostly just pulling ideas out of thin air as you go.