Personal
There are only two reasons people are motivated to do anything: First is to learn, and second is to have fun. When you can compine those two reasons in one area of your life then you have a passion. Passion is the spice that makes life an enjoyable journey.
Here are two quotes that help define the meaning of passion in your life:
Dr. Martin Luther King, Jr. said: "If a man hasn't found something to die for he isn't fit to live".
Vince Lombardi said: "It isn't the will to win that counts it's the will to prepare to win".
Find your passion and life is fun!