Retired Supreme Court Justice David Souter was the principal speaker at the Afternoon Exercises of Harvard’s 359th Commencement on May 27, 2010. Since then the speech has received quite some attention. The text of his speech can be found here. One can also watch the streamed event on YouTube. Just remember that Justice Souter began to talk 1 hour 53 minutes and 36 seconds after the Afternoon Exercises began if you want to skip the rest of the event.