The mythology of the seven spheres and of the soul’s journey from its heavenly home downward to its life on earth and, when that life was done, then upward again through all seven, is as old in this world as our civilization itself.
Campbell identifies the myth of seven celestial spheres as the primordial cosmological framework governing the soul’s descent into birth and its post-mortem ascent, treating this mythology as coextensive with civilization itself.
, Myths to Live By, 1972thesis