Str. Oh no; I mean the change in the rising and setting of the sun and the other heavenly bodies, how in those times they used to set in the quarter where they now rise, and used to rise where they now set, but the god at the time of the quarrel, you recall, changed all that to the present system as a testimony in favor of Atreus.
Y. Soc. Yes, I’ve heard that, too.
Str. And again we have often heard the tale of the reign of Cronus.
Y. Soc. Yes, very often.
Str. And how about the story that the ancient folk were earthborn and not begotten of one another?
Y. Soc. That is one of the old tales, too.
Str. Well, all these stories and others still more remarkable have their source in one and the same event, but in the lapse of ages some of them have been lost and others are told in fragmentary and disconnected fashion. But no one has told the event which is the cause of them all, and so I must tell it now; for that will help us to make clear the nature of the king.
Y. Soc. Very good; just tell your tale and omit nothing.
Str. Listen then. During a certain period God himself goes with the universe as guide in its revolving course, but at another epoch, when the cycles have at length reached the measure of his allotted time, he lets it go, and of its own accord it turns backward in the opposite direction, since it is a living creature and is endowed with intelligence by him who fashioned it in the beginning. Now this reversal of its motion is an inevitable part of its nature for the following reason.
Y. Soc. What reason?
Str. Absolute and perpetual immutability is a property of only the most divine things of all, and body does not belong to this class. Now that which we call heaven and the universe has received from its creator many blessed qualities, but then, too, it partakes also of a bodily nature; therefore it is impossible for it to be entirely free from change; it moves, however, so far as it is able to do so, with a single motion in the same place and the same manner, and therefore it has acquired the reverse motion in a circle, because that involves the least deviation from its own motion. But to turn itself for ever is hardly possible except for the power that guides all moving things; and that this should turn now in one direction and now in the opposite direction is contrary to divine law.