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A Copernican or Ptolemaic, who supports each his different system of astronomy, may hope to produce a conviction, which will remain constant and durable, with his audience. A Stoic or Epicurean displays principles, which may not be durable, but which have an effect on conduct and behaviour.
Between the wit of Sagredo, and the powerful philosophy of Salviati, the peripatetic sage is baffled in every discussion; and there can be no doubt that Galileo aimed a more fatal blow at the Ptolemaic system by this mode of discussing it, than if he had endeavoured to overturn it by direct arguments. The influence of this work on the public mind was such as might have been anticipated.
After all the scientific mockery of the old religious ideal of the importance of man, one begins to wonder if his Ptolemaic fancy that he was the centre of the universe, and that it was all made for him, is not nearer the If truth than the pitiless theories which hardly allow him equality with the flea that perishes.
The deep hold which Arabic life and thought had taken upon their conquerors was shown when Alfonso X., son of Ferdinand, came to the throne. So in love was he with learning and science that he let his kingdom fall into utter confusion while he busied himself with a set of astronomical tables upon which his heart was set and in holding up to ridicule the Ptolemaic theory.
Hence he inferred, that the language employed in the sacred volume in reference to such subjects should be interpreted only in its common acceptation; and that it was in reality as difficult to reconcile the Ptolemaic as the Copernican system to the expressions which occur in the Bible.
In the final examination, he was threatened with torture. He said that before the decree of 1616 he had held the truth of the Copernican system to be arguable, but since then he had held the Ptolemaic to be true. Next day, he publicly abjured the scientific truth which he had demonstrated. He was allowed to retire to the country, on condition that he saw no one.
The University, since the fall of the Jesuits, has been in charge of the Barnabite order, and, for aught I know, the Ptolemaic system is still taught there, together with the dialectic of Aristotle.
In one place he is in a Greek dress, which is not common on the Ptolemaic buildings, as most of the Greek kings are carved upon the walls in the dress of the country. The early kings had often shown their piety to a temple by enlarging the sacred area and adding a new wall and gateway in front of the former; and this custom Euergetes followed at Karnak.
As might be expected, so complex an apparatus was liable, like the Ptolemaic system of the heavens, to occasional derangements; however, by good luck, I was able to apply an easy remedy to these disorders which sometimes threatened to disturb the comfort, and even the serenity, of the great man.
The names imposed on those days, and the order in which they occur, are obviously connected with the Ptolemaic hypothesis of astronomy, each of the planets having an hour assigned to it in its order of occurrence, and the planet ruling first the hour of each day giving its name to that day.
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