"Kindness is the essence of greatness." by Joseph B. Wirthlin

What this quote means is that the world would be a more social place if everyone was kind.Kindness might open a new opportunity for you.For example you might be the only person who stays and helps the coach pick up the equipment and also earning his trust, so later on you might turn into captain to lead the squad.A bad example would be you disrespecting you coach and he will most likely take you off the pitch because you are anti-social and might get expelled from the game losing a man.