The problem of the world ending that only God knows refers to a plot that often appears in novels or fantasy novels. In an unknown world, all the events and the fates of the characters are arranged, but there is a mysterious existence or the existence of God that can predict or change these fates. There are many different answers to this question because different novelists and readers will construct this mysterious existence or the existence of God according to their own imagination and worldview. Some novels might describe this mysterious being as a supernatural force that could control the fate of the world, while others might describe it as a mysterious prophet or the god of fate. No matter what this mysterious being was, its ending was unknown because everyone and everything had been arranged, but it could predict or change these fates. This kind of plot was often used to create suspense and tension to attract the reader's interest.