You get to decide what kind of person you want to be. Will you be someone who makes the world a more compassionate and equitable place? Will you be someone who takes advantage of others? Will you be someone who is stuck thinking like he did in high school? Will you be someone who becomes deeply self-aware and enlightened? It's entirely up to you what kind of person you are and your life will unfold accordingly.
Remember that even the wealthiest and most powerful people on earth can be deeply unhappy when their lives follow a path that creates interior and exterior turmoil and destruction. If you work hard to be as happy and healthy as possible, you'll find that you will be much more proud of the person you are.