That's the title of the commencement address J.K. Rowling delivered at Harvard. One quote:
Actually, I have wracked my mind and heart for what I ought to say to you today. I have asked myself what I wish I had known at my own graduation, and what important lessons I have learned in the 21 years that has expired between that day and this.
I have come up with two answers. On this wonderful day when we are gathered together to celebrate your academic success, I have decided to talk to you about the benefits of failure. And as you stand on the threshold of what is sometimes called ‘real life’, I want to extol the crucial importance of imagination.
Read the whole thing, or watch the video, at Harvard Magazine