J.K. Rowling, of Harry Potter fame, delivers her Commencement Address, “The Fringe Benefits of Failure, and the Importance of Imagination,” at Harvard.
She says, "You might never fail on the scale I did, but some failure in life is inevitable. It is impossible to live without failing at something, unless you live so cautiously that you might as well not have lived at all - in which case, you fail by default."
You can read the entire text and see the audio at http://harvardmagazine.com/go/jkrowling.html.