" The central theme of a story is often crystallized by a moral choice the hero must make, typically near the end of the story. Theme is your view of the proper way to act in the world. It is your moral vision, and it is one of the main reasons you are writing your story. Theme is best expressed through the structure of the story, through what I call the moral argument. "

― , The Anatomy of Story: 22 Steps to Becoming a Master Storyteller