"In a sense, stories are about change. And the measuring stick that 
tells us who succeeds and who doesn't is seen in the ability to change. Good guys are those who willingly accept change and see it as a positive force. Bad guys are those who refuse to change, who will curl up and die in their own juices, unable to move out of the rut their lives represent. To succeed in life is to be able to transform. That's why it's the basis not only of good storytelling but also the world's best-known religions. Change is good because it represents re-birth, the promise of a fresh start."
-- Blake Snyder, Save the Cat!: The last book on screenwriting you'll ever need
