The decisions you make now, bud, can't be changed but with years and years of hard work to redo it... And in those years you become something different. Everybody does as the time passes. You get married, you get into debt... But you're never gonna be the same person you are right now. And promise and potential... It's very fickle, and it just might not be there anymore.
(Robert Redford on Lions for Lambs 2007)