by Mr Ghaz:
The Myths and Legends of the Aztec World: The Holy Serpent
Tracing the distant origins of the great Plumed Serpent Quetzalcoatl as a primeval Mesoamerican fertility and storm deity provides evidence of the serpent’s associations with the sky and the sun. Scholars identify the twin-headed serpent represented in Aztec art and jewelry as an image of the wide sky. The snake also represented the burning power and generative force of the sun: the Aztec sun god Tonatiuh followed a fire snake, or xiuhcoatl, as he made his way across the sky by day. By night, when he had to endure a series of trials in the underworld, the sun fought off his adversaries using the xiuhcoatl as a trick. The solar fire snake became generally associated with physical strength: the Aztecs’ tribal god Huitzilopochtli, who was also a sun god, used a xiuhcoatl to dispatch his brothers and his elder sister the moon goddess Coyolxauhqui when he attacked them with typically martial vigor in the first minutes of his life.