In many stories, dreams have the power to alter fate by influencing characters' decisions or revealing hidden truths. These dreams often serve as a conduit for divine messages or forewarnings, altering the course of events in significant ways. For example, in some Greek myths, prophetic dreams guide heroes on their journeys or warn them of impending danger. The idea that dreams can impact reality highlights the close relationship between the spiritual and the material worlds, emphasizing themes of destiny and choice in human narratives.