Why Don't Most People Quit?

Why don't most people not follow through? Why do they break their own commitments? I think about it all the time. And i would argue that the real case for life, a life at level ten, is to find that one driving force and just follow through. Being a man, being a woman of your word all the time, and being that person that others can rely on. You do that, you have a life by design. Otherwise, you got a life by default.