Chapter XIV. Opinions of Philosophers on First Principles. From Plutarch

[PLUTARCH] ‘THALES of Miletus, one of the seven sages, declared water to be the first principle of all things. This man is thought to have been the founder of philosophy, and from him the Ionic sect derived its name; for it had many successions. After studying philosophy in Egypt he came as an elderly man to Miletus. He says that all things come from water, and are all resolved into water. And he forms his conjecture first from the fact that seed, which is watery, is the first principle of all animal life; thus it is probable that all things have their origin from moisture. His second argument is that all plants derive nourishment and fruitfulness from moisture, and when deprived of it wither away. And the third, that the very fire of the sun, and of the stars, and the world itself are nourished by the evaporations of the waters. For this reason Homer also suggests this notion concerning water,

“Ocean, which is the origin of all.” [1]

This is what Thales says.

‘But Anaximander of Miletus says that the first principle of all things is the infinite, for from this all are produced, and into this all pass away; for which reason also infinite worlds are generated, and pass away again into that from which they spring. So he says the reason why the infinite exists is that the subsisting creation may not be deficient in any point. But he also is at fault in not saying what the infinite is, whether it is air, or water, or earth, or any other corporeal elements; he is wrong therefore in declaring the matter while excluding the efficient cause. For the infinite is nothing else than matter, and matter cannot have an actual existence, unless the efficient cause underlie it.

‘Anaximenes of Miletus declared that the air is the first principle of all things, for from this all are produced, and into it they are resolved again. For example, our soul, he says, is air, for it holds us together; and the whole world too is encompassed by air and breath, and air and breath are used as synonyms. But he too is wrong in thinking that living beings consist of simple homogeneous air and breath; for it is impossible that the matter can exist as sole principle of things, but we must assume the efficient cause also. As for instance silver suffices not for the production of the drinking-cup, unless there be the efficient cause, that is the silversmith; the case is similar with copper and various kinds of wood, and all other matter.

‘Heracleitus and Hippasus of Metapontum say that fire is the principle of all things: for from fire, they say, all things are produced and all end in fire: and all things in the world are created as it gradually cools down. For first the coarsest part of it is pressed together and becomes earth; then the earth being resolved by the natural force of the fire is turned into water, and being vaporised becomes air. And again the world and all the bodies in it are consumed in a conflagration by fire. Fire therefore is the first principle, because all things come from it, and the end, inasmuch as they are all resolved into it.

‘Democritus, who was followed long after by Epicurus, said that the first principles of all things are bodies indivisible, but conceivable by reason, with no admixture of vacuum, uncreated, imperishable, not capable of being broken, nor of receiving shape from their parts, nor of being altered in quality, but perceptible by reason only; that they move, however, in the vacuum, and through the vacuum, and that both the vacuum itself is infinite and the bodies infinite. And the bodies possess these three properties, shape, magnitude, and weight. Democritus, however, said two, magnitude and shape; but Epicurus added to them a third, namely weight. For he said the bodies must be moved by the impulse of the weight, since otherwise they will not be moved at all. The shapes of the atoms are limitable, not infinite: for there are none either hook-shaped, nor trident-shaped, nor ring-shaped. For these shapes are easily broken, whereas the atoms are impassive and cannot be broken; but they have their proper shapes, which are conceivable by reason. And the “atom” is so called, not because it is extremely small, but because it cannot be divided, being impassive, and free from admixture of vacuum: so that if a man says “atom” he means unbreakable, impassive, unmixed with vacuum. And that the atom exists is manifest: for there are also elements (στοιχεῖα), and living beings that are empty, and there is the Monad.

‘Empedocles, son of Meton, of Agrigentum, says that there are four elements, fire, air, water, earth, and, two original forces, love and hate, of which the one tends to unite, and the other to separate. And this is how he speaks:

“Learn first four roots of all things that exist: Bright Zeus, life-giving Hera, and the god Of realms unseen, and Nestis, who with tears Bedews the fountain-head of mortal life.” [2]

For by “Zeus” he means the seething heat and the ether; and by “life-giving Hera,” the air; the earth by Aidoneus, and by Nestis and “the fountain-head of mortal life,” the seed, as it were, and the water.’

So great is the dissonance of the first physical philosophers: such too is their opinion concerning first principles, assuming, as they did, no god, no maker, no artificer, nor any cause of the universe, nor yet gods, nor incorporeal powers, no intelligent natures, no rational essences, nor anything at all beyond the reach of the senses, in their first principles.

In fact Anaxagoras alone is mentioned as the first of the Greeks who declared in his discourses about first principles that mind is the cause of all things. They say at least that this philosopher had a great admiration for natural science beyond all who were before him: for the sake of it certainly he left his own district a mere sheepwalk, and was the first of the Greeks who stated clearly the doctrine of first principles. For he not only pronounced, like those before him, on the essence of all things, but also on the cause which set it in motion.

‘”For in the beginning,” he said, “all things were mingled together in confusion: but mind came in, and brought them out of confusion into order.’”

One cannot but wonder how this man, having been the first among Greeks who taught concerning God in this fashion, was thought by the Athenians to be an atheist, because he regarded not the sun but the Maker of the sun as God, and barely escaped being stoned to death.

But it is said that even he did not keep the doctrine safe and sound: for though he made mind preside over all things, he did not go on to render his physical system concerning the existing world accordant with mind and reason. Hear in fact how in Plato’s dialogue Of the SoulSocrates blames him in the following passage: [3]