We all have a past. We've all made mistakes and done things we wish we hadn't done. We all wish we could just push a "delete" button on some of the choices we made yesterday and some of the things we've experienced years ago. What's more, our past has a way of shaping who we are today. It's amazing how one single dramatic experience of rejection in childhood can last through adulthood and forever alter our self-image or how one bad decision in college...