Elements of mythology express the duality of light and darkness by depicting the eternal struggle between opposing forces. Many myths utilize characters like heroes and villains to embody these concepts, illustrating how light symbolizes goodness and hope, while darkness often represents chaos and evil. For example, in many cultures, the sun god symbolizes light and order, whereas a trickster or dark deity represents the chaos of the night. This duality reflects human nature and the complexities of existence, emphasizing that both elements are essential for balance in the universe.