In the early days of the universe, there was a great struggle for empire between Zeus and the Titans. The Titans, giant powers of heaven and earth, were for seizing whatever they wanted, with no more ado than a whirlwind. Prometheus, the wisest of all their race, long tried to persuade them that good counsel would avail more than violence; but they refused to listen. Then, seeing that such rulers would soon turn heaven and earth into chaos again, Prometheus left them to their own devices, and went over to Zeus, whom he aided so well that the Titans were utterly overthrown. Down into Tartarus they went, to live among the hidden fires of the earth; and there they spent a long term of bondage, muttering like storm, and shaking the roots of mountains. One of them was Enceladus, who lay bound under Aetna; and one, Atlas, was made to stand and bear up the weight of the sky on his giant shoulders.