How does Forster use the analogy of Scheherazade to establish his point ?

Forster uses the analogy of Scheherazade to establish his point that story telling with an element of surprise is the most important aspect in a novel. He refers to the story of Scheherazade to bring home the point that her survival depended on her ability to tell stories one after another to her husband king. Similarly, the art of novel is dependent on the story line and the surprise and suspense that a story creates. Without this element a novel cannot come into existence nor it can survive.