While a story’s inspiration may be a dream and its final effect aesthetic emotion, a work moves from an open premise to a fulfilling climax only when the writer is possessed by serious thought. For an artist must have not only ideas to express, but ideas to prove. Expressing an idea, in the sense of exposing it, is never enough. The audience must not just understand; it must believe. You want the world to leave your story convinced that yours is a truthful metaphor for life. And the means by which you bring the audience to your point of view resides in the very design you give your telling. As you create your story, you create your proof; idea and structure intertwine in a rhetorical relationship.
– Robert McKee, Story