"Change will not occur, until the pain gets bad enough." For it is only pain that has the power to force a change in your core belief system. The old belief system -- about life, about yourself, about people, about God/deity, about family, about what is important, about the world, etc -- has to become so confining, so painful, so suffocating, so debilitating as to drive the person away from it, as to give the person the courage to both cut it away and pursue something new and terrifyingly unknown.

This snippet from Joseph Campbell comes from "A Joseph Campbell Companion: Reflections on the Art of Living"