Here let us sum up:--The science of pure knowledge had a part which was the science of command, and this had a part which was a science of wholesale command; and this was divided into the management of animals, and was again parted off into the management of herds of animals, and again of land animals, and these into hornless, and these into bipeds; and so at last we arrived at man, and found the political and royal science. And yet we have not clearly distinguished the political shepherd from his rivals. No one would think of usurping the prerogatives of the ordinary shepherd, who on all hands is admitted to be the trainer, matchmaker, doctor, musician of his flock. But the royal shepherd has numberless competitors, from whom he must be distinguished; there are merchants, husbandmen, physicians, who will all dispute his right to manage the flock. I think that we can best distinguish him by having recourse to a famous old tradition, which may amuse as well as instruct us; the narrative is perfectly true, although the scepticism of mankind is prone to doubt the tales of old. You have heard what happened in the quarrel of Atreus and Thyestes? 'You mean about the golden lamb?' No, not that; but another part of the story, which tells how the sun and stars once arose in the west and set in the east, and that the god reversed their motion, as a witness to the right of Atreus. 'There is such a story.' And no doubt you have heard of the empire of Cronos, and of the earthborn men? The origin of these and the like stories is to be found in the tale which I am about to narrate.