In the beginning, according to the wisdom of the ancients, the cosmos was a profound architecture of balance. Before the first dawn, the gods Shu and Tefnut brought forth Geb, the god of the earth, and Nut, the goddess of the sky. In those early times, Geb and Nut were locked in a constant embrace, leaving no room for life to breathe or for the sun to shine. It was Shu, the god of air and breath, who intervened on the orders of Ra, the supreme sun god. Shu stood upon Geb and thrust his arms upward, lifting Nut high above her brother-husband. Her body arched into a vast canopy, her hands touching the western horizon and her feet resting upon the eastern horizon. Her skin became the velvet blue of the firmament, decorated with a million glittering stars, and her belly became the path for the celestial bodies.
Ra, the radiant father of the gods, ruled the world during the day. He traveled across the expanse of Nut’s back in his solar barque, known as the Mandjet or the Boat of Millions of Years. As the sun, he was the source of all warmth, light, and growth. During the daylight hours, he appeared as a vigorous king, his golden crown adorned with the uraeus serpent that spat fire at his enemies. He watched over the lands of Upper and Lower Egypt, ensuring that the Nile flowed and that the crops grew under the watchful eye of Ma'at, the principle of truth and order. But even a god as powerful as Ra was subject to the laws of time and the Great Cycle. As the day progressed, Ra would age. By the late afternoon, he was represented as Atum, the elderly sun, leaning on a staff, his strength fading as the shadows grew long over the pyramids and the dunes.
As the golden disk approached the Western Horizon—the gateway to the Duat or the underworld—a magnificent and terrifying ritual took place. The ancient Egyptians believed that the western horizon was not merely a geographic point, but the open mouth of the goddess Nut. At the precise moment of sunset, as the sky turned the color of bruised violets and deep ambers, Nut would lean down and swallow the sun god. This act was not one of destruction, but of transition. The disappearance of the sun was the beginning of a perilous journey through the celestial body of the sky-mother. The world above would fall into darkness, lit only by the stars on Nut's skin, while the true drama shifted to the hidden realms of the night.
Inside the body of Nut, the sun god transformed into Afu-Ra, the ram-headed god of the night. He switched his vessel from the Day Boat to the Mesektet, the Evening Barque. The journey through the twelve hours of the night was a journey through the Duat, a subterranean or internal landscape filled with gates, caverns, and terrifying monsters. Each hour represented a different challenge and a different region of Nut’s anatomy. The gods and the spirits of the justified dead accompanied Ra on this voyage, acting as his protectors and rowers. Among them were Thoth, the god of wisdom, who recorded the passage of time, and Set, the god of storms, who stood at the prow of the boat. Despite his reputation for chaos, Set was essential in the night, for he possessed the strength and ferocity required to defend the sun god from the ultimate enemy.
That enemy was Apep (or Apophis), the great serpent of darkness and chaos. Apep lived in the deepest recesses of the night, a creature of pure void that sought to consume the sun and plunge the universe back into the primordial waters of Nun. Every night, as Ra’s boat passed through the middle hours of darkness, Apep would emerge to coil his massive body around the barque, attempting to capsize it or swallow the sun whole. The battle was fierce. The air of the underworld would crackle with the energy of the conflict. Set would use his great spear to pierce the serpent's hide, while the magical incantations of Isis and Thoth bound the monster in chains. This struggle was the central tension of the Egyptian night; if Ra were to fail, the sun would never rise again, and time itself would cease to exist.