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

Forster takes the example of Scheherazade who became wife to a king who executed all his wives after the first night. So Scheherazade told him a story every night and broke off at a point of suspense and hence the king didn’t have her executed because he wanted to know what happened next. Forster says that this element of suspense is the only attraction of a story and other only power the novelist have on the readers.