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Of Nature.
Empedocles affirms that Nature is nothing else but the mixture and separation of the elements; for thus he writes in the first book of his natural philosophy:—
Nature gives neither life nor death,
Mutation makes us die or breathe.
The elements first are mixed, then each
Do part: this Nature is in mortal speech.
Anaxagoras is of the same opinion, that Nature is coalition and separation, that is, generation and corruption.
Having finished my dissertation concerning principles and elements and those things which chiefly appertain to them, I will turn my pen to discourse of those things which are produced by them, and will take my beginning from the world, which contains and encompasseth all beings.
Pythagoras was the first philosopher that called the world [Greek omitted], from the order and beauty of it; for so that word signifies. Thales and his followers say the world is one. Democritus, Epicurus, and their scholar Metrodorus affirm that there are infinite worlds in an infinite space, for that infinite vacuum in its whole extent contains them. Empedocles, that the circle which the sun makes in its motion circumscribes the world, and that circle is the utmost bound of the world. Seleucus, that the world knows no limits. Diogenes, that the universe is infinite, but this world is finite. The Stoics make a difference between that which is called the universe, and that which is called the whole world; — the universe is the infinite space considered with the vacuum, the vacuity being removed gives the right conception of the world; so that the universe and the world are not the same thing.
The Stoics say that the figure of the world is spherical, others that it is conical, others oval. Epicurus, that the figure of the world may be globular, or that it may admit of other shapes.
Democritus, Epicurus, and those philosophers who introduced atoms and a vacuum, affirm that the world is not an animal, nor governed by any wise Providence, but that it is managed by a nature which is void of reason. All the other philosophers affirm that the world is informed with a soul, and governed by reason and Providence. Aristotle is excepted, who is somewhat different; he is of opinion, that the whole world is not acted by a soul in every part of it, nor hath it any sensitive, rational, or intellectual faculties, nor is it directed by reason and Providence in every part of it; of all which the heavenly bodies are made partakers, for the circumambient spheres are animated and are living beings; but those things which are about the earth are void of those endowments; and though those terrestrial bodies are of an orderly disposition, yet that is casual and not primogenial.
Whether the World is Eternal and Incorruptible.
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.
Whence Does the World Receive its Nutriment?
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.
From what Element God Did Begin to Raise the Fabric of the World.
The natural philosophers pronounce that the forming of this world took its original from the earth, it being its centre, for the centre is the principal part of the globe. Pythagoras, from the fire and the fifth element. Empedocles determines, that the first and principal element distinct from the rest was the aether, then fire, after that the earth, which earth being strongly compacted by the force of a potent revolution, water springs from it, the exhalations of which water produce the air; the heaven took its origin from the aether, and fire gave a being to the sun; those things nearest to the earth are condensed from the remainders. Plato, that the visible world was framed after the exemplar of the intellectual world; the soul of the visible world was first produced, then the corporeal figure, first that which proceeded from fire and earth, then that which came from air and water. Pythagoras, that the world was formed of five solid figures which are called mathematical; the earth was produced by the cube, the fire by the pyramid, the air by the octahedron, the water by the icosahedron, and the globe of the universe by the dodecahedron. In all these Plato hath the same sentiments with Pythagoras.
In what Form and Order the World Was Composed.
Parmenides maintains that there are small coronets alternately twisted one within another, some made up of a thin, others of a condensed, matter; and there are others between mixed mutually together of light and of darkness, and around them all there is a solid substance, which like a firm wall surrounds these coronets. Leucippus and Democritus cover the world round about, as with a garment and membrane. Epicurus says that that which abounds some worlds is thin, and that which limits others is gross and condensed; and of these spheres some are in motion, others are fixed. Plato, that fire takes the first place in the world, the second the aether, after that the air, under that the water; the last place the earth possesseth: sometimes he puts the aether and the fire in the same place. Aristotle gives the first place to the aether, as that which is impassible, it being a kind of a fifth body after which he placeth those that are passible, fire, air, and water, and last of all the earth. To those bodies that are accounted celestial he assigns a motion that is circular, but to those that are seated under them, if they be light bodies, an ascending, if heavy, a descending motion. Empedocles, that the places of the elements are not always fixed and determined, but they all succeed one another in their respective stations.
What is the Cause of the World’s Inclination.
Diogenes and Anaxagoras state that, after the world was composed and had produced living creatures, the world out of its own propensity made an inclination toward the south. Perhaps this may be attributed to a wise Providence (they affirm), that thereby some parts of the world may be habitable, others uninhabitable, according as the various climates are affected with a rigorous cold, or a scorching heat, or a just temperament of cold and heat. Empedocles, that the air yielding to the impetuous force of the solar rays, the poles received an inclination; whereby the northern parts were exalted and the southern depressed, by which means the whole world received its inclination.
Of that Thing which is Beyond the World, and Whether it be a Vacuum or Not.
Pythagoras and his followers say that beyond the world there is a vacuum, into which and out of which the world hath its respiration. The Stoics, that there is a vacuum into which infinite space by a conflagration shall be dissolved. Posidonius, not an infinite vacuum, but as much as suffices for the dissolution of the world; and this he asserts in his first book concerning the Vacuum. Aristotle affirms, that a vacuum does not exist. Plato concludes that neither within nor without the world there is any vacuum.