The theme of duality manifests in various mythologies through the coexistence of contrasting forces such as good and evil, light and dark, or creation and destruction. This duality is exemplified in the stories of figures like Yin and Yang in Chinese philosophy, symbolizing balance. In many myths, gods embody both benevolent and malevolent traits, illustrating the complexities of existence. This approach emphasizes the importance of harmony and the understanding that opposing forces are essential in shaping the universe.