Pythagoras [and Plato], agreeing with the Stoics, affirm that the world was framed by God, and being corporeal is obvious to the senses, and in its own nature is obnoxious to destruction; but it shall never perish, it being preserved by the providence of God. Epicurus, that the world had a beginning, and so shall have an end, as plants and animals have. Xenophanes, that the world never had a beginning, is eternal and incorruptible. Aristotle, that the part of the world which is sublunary is subject to change, and there terrestrial beings find a decay.
Aristotle says that, if the world be nourished, it will likewise be dissolved; but it requires no aliment, and will therefore be eternal. Plato, that this very world prepares for itself a nutriment, by the alteration of those things which are corruptible in it. Philolaus affirms that a destruction happens to the world in two ways; either by fire failing from heaven, or by the sublunary water being poured down through the whirling of the air; and the exhalations proceeding from thence are aliment of the world.