Shu

Shu is the Egyptian god of the air and of the empty, light-filled space between earth and heaven, the first-born child of the creator Atum together with his twin sister Tefnut, the moisture. In the cosmogony of Heliopolis the pair are the first sexually differentiated gods, and from them come Geb the earth and Nut the sky. Shu's defining act is the separation that makes the world habitable: he stands between his children Geb and Nut and lifts Nut high above the reclining Geb, holding the sky apart from the earth so that there is a space of air in which the sun can travel and living things can breathe.

Egyptian art shows him kneeling with upraised arms beneath the arched body of the sky-goddess, sometimes assisted by other gods, in one of the most fundamental images of the ordered cosmos. As the personification of the air and of the sunlit space of the day, Shu is associated with the wind, with coolness and with the breath of life itself; the name was understood in connection with dryness and emptiness. Together with Tefnut he forms the first pair of the Ennead, the nine great gods of Heliopolis, and stands at the very beginning of the created order.

Beyond his role as the god who separates earth from sky, later Egyptian religious texts developed a further chapter of Shu's story in which he takes an active turn on the throne itself. According to material preserved chiefly in New Kingdom and later ritual papyri, when the aging sun god Ra grows weary of ruling over gods and men and withdraws to travel the sky in his solar barque, he hands earthly kingship to his son Shu, who reigns for a time as king of the gods on earth, continuing the work of maintaining cosmic order that Ra had begun.

Shu's reign is not peaceful: the same hostile forces of chaos associated with the serpent Apep are said to rise against him, and after enduring conflict and hardship as king, Shu in turn grows weary and ascends to join Ra in the sky, passing rule down to his own son Geb, who becomes king in his place, before the succession continues on through Osiris and eventually to Horus. This chain casts the standard genealogy of the Heliopolitan Ennead, Ra to Shu to Geb to Osiris to Horus, not merely as a family tree but as a literal sequence of divine kingships, each ruler in turn wearying of the burdens of rule and passing them to the next generation, a theological pattern that mirrors and validates the succession of human pharaohs, each king understood as inheriting an office that stretches back through Horus and the Ennead to the very reign of the sun god himself. The sources for Shu's own kingship are fragmentary and appear relatively late in Egyptian religious history, so the episode is best treated as one strand of temple theology's elaboration on the older core myth rather than a complete, continuously attested narrative.