If you don't like the way the world is, you change it. You have an obligation to change it. You just do it one step at a time.
Service is what life is all about.
You're not obligated to win. You're obligated to keep trying to do the best you can every day. We must not, in trying to think about how we can make a big difference, ignore the small daily differences we can make which, over time, add up to big differences that we often cannot foresee. No person has the right to rain on your dreams.