In mythology, prophecy plays a crucial role in shaping the lives of heroes. It often serves as a motivation for their quests, revealing fateful events that must be fulfilled. Prophecies act as a double-edged sword; while they guide heroes toward their ultimate destiny, they can also present challenges, such as the struggle against predetermined fate. Characters like Oedipus and Achilles exemplify how prophecies can dictate life choices, raise questions about free will, and create dramatic tension within narratives.