The relationship between the sun and moon in different mythologies often varies, illustrating duality and balance. In some cultures, such as the Greeks, the sun is represented by Helios, while the moon is personified by Selene. These celestial bodies often represent opposing forces, like masculinity and femininity, or day and night. This interplay reflects the importance of both light and darkness, culminating in a deeper understanding of the human experience within the grand scheme of the universe.