Often times I see myself as a failure in many aspects of my life. That sometimes makes me think I can't come back from my failures or that they define me. But I came across this speech given by J. K. Rowling at the 2008 Harvard Commencement Ceremony. It gave me a lot to think about and inspired me greatly.
You can check it out here, http://harvardmagazine.com/commencement/the-fringe-benefits-failure-the-importance-imagination
It also has a video so you can watch and listen if you are so inclined.