The camaraderie that firefighters have, that brotherhood that forms among them - my father was a part of that, and it came from having a shared sense of purpose. He told me that whatever you do in life, it can't just be about making money. It's important that you work to make the world a better place, that you help improve the lives of the people around you.
Mike Massimino, Spaceman: An Astronaut's Unlikely Journey to Unlock the Secrets of the Universe
shared-purpose, work, work-ethic