The world we live in is fluid and enveloping. We affect our environment just by existing in it. Anthropologists widely recognize that you change your environment merely by observing it. There is no passive existence in this world. You cannot look on from a distance and think that you are irrelevant. OK- so that is important to understand. Now we can realize why we must be Good Global Citizens: it's because our presence is powerful. We are players in this game whether we chose to be or not.
Today the news is filled with dramatic stories of situations worldwide and touching pieces from close to home. They all have one thing in common- someone got involved and changed the course of events. Usually these people chose to be involved- they stepped in when needed, they took action when they saw a cause, they were part of a chain of events. But look in the periphery. The most amazing content is that about the bystanders who didn't actually stand by. Someone got involved merely due to proximity. They became heros or victims.
There's no such thing as being just a "person in the crowd". The crowd itself is an entity, made up of unique individuals who can influence the pattern of the party in a split second. If one person were to shout "FIRE!" then the crush would begin. One person can start a chant. One person can ignite an emotion.
The power comes from what you choose to DO with your presence. Consider how you will turn your potential energy into kinetic energy. Smile and put a warm feeling in your heart so that the energy you resonate will be welcoming to those around you. Echo peace so that your environment will be shaped by your calming presence. Offer help- become actively involved rather than passively impressive. Educate yourself so that you can educate others.
One person CAN change the world. Your presence DOES matter.