What is your WHY?

Quite some time ago, I listened to a motivational speaker discuss purpose, goal setting, and our individual drive to succeed at a goal. His hook what that "you have to find your why." What drives you? What motivates you to go on? When you take away all of the fluff in your thinking, what is that one thing that makes you want to go on?

It may sound trite, but my children are the reason I REFUSE to fail. My goal is to be the best DJ and entertainer that I can be. My children are my motivation because I want to be a living example and testimony for how we approach life, how we fight through difficulties, how we overcome our mistakes, and how we can embrace our weaknesses and shortcomings without ever becoming complacent.