When it comes to those that are immensely successful whether it applies to running a charity, non-profit, or someone that just has a major following, the one similarity that I consistently see among these people in my travels is that they are crazy enough to believe that they can make that change. Those who have truly left a mark on human beings for decades or centuries are the ones that have been crazy enough to try to motivate the change. Have the belief in yourself to know (not think) that you can make a lasting impact not only for those around you but for every person on the planet.