Greene, L., 2018, Jung's Studies in Astrology: Prophecy, Magic, and the Qualities of Time, 161.
The so-called Platonic Year of 26,000 years was never described by Plato, as precession had not been discovered in his time. Plato defined the ‘perfect year’ as the return of the celestial bodies and the diurnal rotation of the fixed stars to their original positions at the moment of creation. The Roman astrologer Julius Firmicus Maternus, echoing Plato, discussed a great cycle of 300,000 years, after which the heavenly bodies will return to those positions that they held when the world was first created. Firmicus seems to have combined Plato’s ‘perfect year’ with the Stoic belief that the world undergoes successive conflagrations of fire and water, after which it is regenerated. But the Stoics did not describe any transformations of consciousness, as Jung did – only a precise replication of what had gone before. Various other authors of antiquity offered various other lengths for the Great Year, ranging from 15,000 years to 2,484 years. But none of these speculations was based on the movement of the vernal equinoctial point through the constellations. It was in modern astrological, Theosophical, and occult literature that Jung found inspiration for his own highly individual interpretation of the Aquarian Aion.
Greene, L., 2018, Jung's Studies in Astrology: Prophecy, Magic, and the Qualities of Time. Londres/ Nova Iorque: Routledge.