America's 42nd president spoke this weekend at Harvard's Class Day, a traditional event held for graduating seniors. While Class Day often features pop icons and comedians -- take this speech by Ali G from a few yeas ago -- Clinton's speech was a bit more serious and idealistic, and it reminds us that there may be again a day when we can look to the White House for substance and inspiration. This too shall pass. You can watch Part 1 of his presentation below. Here are links to Parts 2 and 3.