The duality of good and evil signifies conflict and balance in various mythologies. It often illustrates the constant struggle between opposing forces, such as light and darkness, order and chaos, which are central to understanding the nature of existence. For example, in Zoroastrianism, Ahura Mazda embodies good, while Angra Mainyu represents evil, showcasing a cosmic dualism. These narratives act as allegories for the moral choices individuals face, helping societies define ethics and guiding principles in life.