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Varro also studied at Athens, especially under the philosopher Antiochus of Ascalon, whose aim it was to lead back the Academic school from the scepticism of Arcesilaus and Carneades to the tenets of the early Platonists, as he understood them.
Varro was not surpassed in the compass of his writings by any ancient, not even by any one of the later Greek philosophers, to some of whom tradition ascribes a fabulous number of separate works.
Varro's etymologies could be only a priori guesses, but he was well aware of their character, and very clearly states at the outset of the fifth book the hindrances that barred the way to sound knowledge.
The Romans, he said, identified the sky with Jupiter and Earth with Juno: "These same gods Sky and Earth are Jupiter and Juno..." and he quoted Ennius who said Jupiter is called air by the Greeks, and is identified with wind and cloud, rain, and cold.
Varro added: "Because all come from him and are under him, he addresses him with the words: 'O father and king of the gods and the mortals.' [On the Latin Language, V, 65.]
Varro does not associate the word firmamentum with the sky.