First, we have the ancient worship of the Sun, implicit, if not explicit, in a great part of the oldest Greek rituals, and then idealized by Plato in the Republic, where the Sun is the author of all light and life in the material world, as the Idea of Good is in the ideal world. This worship came gradually into contact with the traditional and definite Sun-worship of Persia. The final combination took place curiously late. It was the Roman conquests of Cilicia, Cappadocia, Commagene, and Armenia that gave the decisive moment.[139:2] To men who had wearied of the myths of the poets, who could draw no more inspiration from their Apollo and Hyperion, but still had the habits and the craving left by their old Gods, a fresh breath of reality came with the entrance of Ἥλιος ἀνίκητος Μίθρας, 'Mithras, the Unconquered Sun'. But long before the triumph of Mithraism as the military religion of the Roman frontier, Greek literature is permeated with a kind of intense language about the Sun, which seems derived from Plato.[139:3] In later times, in the fourth century a. d. for instance, it has absorbed some more full-blooded and less critical element as well.
Secondly, all the seven planets. These had a curious history. The planets were of course divine and living bodies, so much Plato gave us. Then come arguments and questions scattered through the Stoic and eclectic literature. Is it the planet itself that is divine, or is the planet under the guidance of a divine spirit? The latter seems to win the day. Anthropomorphism has stolen back upon us: we can use the old language and speak simply of the planet Mercury as Ἑρμοῦ ἀστήρ. It is the star of Hermes, and Hermes is the spirit who guides it.[140:1] Even Plato in his old age had much to say about the souls of the seven planets. Further, each planet has its sphere. The Earth is in the centre, then comes the sphere of the Moon, then that of the Sun, and so on through a range of seven spheres. If all things are full of gods, as the wise ancients have said, what about those parts of the sphere in which the shining planet for the moment is not? Are they without god? Obviously not. The whole sphere is filled with innumerable spirits everywhere. It is all Hermes, all Aphrodite. (We are more familiar with the Latin names, Mercury and Venus.) But one part only is visible. The voice of one school, as usual, is raised in opposition. One veteran had seen clearly from the beginning whither all this sort of thing was sure to lead. 'Epicurus approves none of these things.'[140:2] It was no good his having destroyed the old traditional superstition, if people by deifying the stars were to fill the sky with seven times seven as many objects of worship as had been there before. He allows no Schwärmerei about the stars. They are not divine animate beings, or guided by Gods. Why cannot the astrologers leave God in peace? When their orbits are irregular it is not because they are looking for food. They are just conglomerations of ordinary atoms of air or fire—it does not matter which. They are not even very large—only about as large as they look, or perhaps smaller, since most fires tend to look bigger at a distance. They are not at all certainly everlasting. It is quite likely that the sun comes to an end every day, and a new one rises in the morning. All kinds of explanations are possible, and none certain. Μόνον ὁ μῦθος ἀπέστω. In any case, as you value your life and your reason, do not begin making myths about them!
On other lines came what might have been the effective protest of real Science, when Aristarchus of Samos (250 b. c.) argued that the earth was not really the centre of the universe, but revolved round the Sun. But his hypothesis did not account for the phenomena as completely as the current theory with its 'Epicycles'; his fellow astronomers were against him; Cleanthes the Stoic denounced him for 'disturbing the Hearth of the Universe', and his heresy made little headway.[141:1]
The planets in their seven spheres surrounding the earth continued to be objects of adoration. They had their special gods or guiding spirits assigned them. Their ordered movements through space, it was held, produce a vast and eternal harmony. It is beautiful beyond all earthly music, this Music of the Spheres, beyond all human dreams of what music might be. The only pity is that—except for a few individuals in trances—nobody has ever heard it. Circumstances seem always to be unfavourable. It may be that we are too far off, though, considering the vastness of the orchestra, this seems improbable. More likely we are merely deaf to it because it never stops and we have been in the middle of it since we first drew breath.[142:1]
The planets also become Elements in the Kosmos, Stoicheia. It is significant that in Hellenistic theology the word Stoicheion, Element, gets to mean a Daemon—as Megathos, Greatness, means an Angel.[142:2] But behold a mystery! The word Stoicheia, 'elementa', had long been used for the Greek A B C, and in particular for the seven vowels α ε η ι ο υ ω. That is no chance, no mere coincidence. The vowels are the mystic signs of the Planets; they have control over the planets. Hence strange prayers and magic formulae innumerable.
Even the way of reckoning time changed under the influence of the Planets. Instead of the old division of the month into three periods of nine days, we find gradually establishing itself the week of seven days with each day named after its planet, Sun, Moon, Ares, Hermes, Zeus, Aphrodite, Kronos. The history of the Planet week is given by Dio Cassius, xxxvii. 18, in his account of the Jewish campaign of Pompeius. But it was not the Jewish week. The Jews scorned such idolatrous and polytheistic proceedings. It was the old week of Babylon, the original home of astronomy and planet-worship.[143:1]
For here again a great foreign religion came like water in the desert to minds reluctantly and superficially enlightened, but secretly longing for the old terrors and raptures from which they had been set free. Even in the old days Aeschylus had called the planets 'bright potentates, shining in the fire of heaven', and Euripides had spoken of the 'shaft hurled from a star'.[143:2] But we are told that the first teaching of astrology in Hellenic lands was in the time of Alexander, when Bêrôssos the Chaldaean set up a school in Cos and, according to Seneca, Belum interpretatus est. This must mean that he translated into Greek the 'Eye of Bel', a treatise in seventy tablets found in the library of Assur-bani-pal (686-626 b. c.) but composed for Sargon I in the third millennium b. c. Even the philosopher Theophrastus is reported by Proclus[143:3] as saying that 'the most extraordinary thing of his age was the lore of the Chaldaeans, who foretold not only events of public interest but even the lives and deaths of individuals'. One wonders slightly whether Theophrastus spoke with as much implicit faith as Proclus suggests. But the chief account is given by Diodorus, ii. 30 (perhaps from Hecataeus).
'Other nations despise the philosophy of Greece. It is so recent and so constantly changing. They have traditions which come from vast antiquity and never change. Notably the Chaldaeans have collected observations of the Stars through long ages, and teach how every event in the heavens has its meaning, as part of the eternal scheme of divine forethought. Especially the seven Wanderers, or Planets, are called by them Hermêneis, Interpreters: and among them the Interpreter in chief is Saturn. Their work is to interpret beforehand τὴν τῶν θεῶν ἔννοιαν, the thought that is in the mind of the Gods. By their risings and settings, and by the colours they assume, the Chaldaeans predict great winds and storms and waves of excessive heat, comets, and earthquakes, and in general all changes fraught with weal or woe not only to nations and regions of the world, but to kings and to ordinary men and women. Beneath the Seven are thirty Gods of Counsel, half below and half above the Earth; every ten days a Messenger or Angel star passes from above below and another from below above. Above these gods are twelve Masters, who are the twelve signs of the Zodiac; and the planets pass through all the Houses of these twelve in turn. The Chaldaeans have made prophecies for various kings, such as Alexander who conquered Darius, and Antigonus and Seleucus Nikator, and have always been right. And private persons who have consulted them consider their wisdom as marvellous and above human power.'