The other day, I was in such a hurry. On my way, there were firetrucks and ambulances blocking the road and causing a delay. My initial remark was, why would this happen at such a perfect moment when I am in such a hurry? Then I thought, someone might have been hurt, perhaps a heart attack or an accident. And it could happen to me too. Then I realized that it was not only me that was stuck in traffic. There's a multitude of people whose lives are nudged a bit by what happened to another person.
Interconnectedness. Its simple fact - we are all interconnected. What happens to one person affects the lives of others. Moreso the actions of each person, impacts others directly. And the effect propagates like a wave of connected cause-and-effect. This wave of effect even surpasses the six-degrees of separation between people, and even outlives the person causing the effect. As an example, think of all the people written in history and their contributions to mankind. Their passions, ideas, songs and life resonates even to this very day, affecting lives of millions and spanning hundreds of years.
They are just examples. You don't have to be written in history to make a legacy. You are already leaving your legacy each day. Your footprints in life may not be prominent, but it is still significant. Your tracks may seem irrelevant today, but may probably have long-lasting effects tomorrow.
We each have a say in this universe, whether we like it or not. There might be more to it than the brief life of a simple human being in this world.