He proceeded to develop the reasons for his belief.
“The reign of Jupiter,” he said, “began after the Golden Age. We know through the traditions preserved for us by the poets that the son of Saturn succeeded to his father in the governing of the world. Now, everything that had a beginning must have an end. It is foolish to suppose that anything finite in one part can be infinite in another. It would then become necessary to call it finite and infinite as a whole, which would be absurd. Anything possessed of an extreme point can be measured from that point itself, and could not in any way cease to be measured at any point of its extent, without changing its nature, and the proper of what is measurable is to be comprised between two extreme points. We may therefore make up our minds that the reign of Jupiter will end just as did that of Saturn. As Æschylus has said:
“‘Jupiter is subordinate to Anankè. He cannot escape his fate.’”
Gallio thought the same, for reasons derived from the observation of nature.
“I consider with you, Apollodorus, that the reigns of the gods are not immortal, and the observation of the celestial phenomena inclines me to this belief. The heavens, as well as the earth, are subject to corruption, and the divine palaces, liable to ruin just as the dwellings of mankind, crumble under the weight of the centuries. I have seen stones fall from the aerial regions. They were blackened and corroded by fire, and bore testimony to a celestial conflagration.
“The bodies of the gods, Apollodorus, are not any more exempt from injury than their dwellings. If it be true, as Homer teaches, that the gods, inhabitants of Olympus, impregnate the flanks of goddesses and mortal women, it is assuredly because they are not themselves immortal, in spite of their life’s span being greater than that of mankind, and hence it is patent that fate subjects them to the necessity of transmitting a life which they may not enjoy for ever.
“In truth,” said Lollius, “it is hardly to be conceived that immortals should produce children in the same way as human beings and animals, or even that they should possess organs adapted to such a purpose. But perhaps the loves of the gods owe their origin to the mendacity of the poets.”
Apollodorus persisted in his assertion that the reign of Jupiter would some day cease, supporting his opinion with subtile reasons. He prophesied that Prometheus would succeed the son of Saturn.
“Prometheus,” replied Gallio, “was set free by Hercules with the consent of Jupiter, and he enjoys in Olympus the happiness he owes to his foresight and to his love of mankind. Nothing will ever happen to change his happy fate.”
Apollodorus asked him: