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The Lives and Opinions of Eminent Philosophers

Diogenes Laertius

some with the Timæus, some with the Phædrus, others again with the Theætetus. Many make the Defence of Socrates the first piece. There are some dialogues attributed to him which are confessedly spurious. The Midon, or the Horse-breeder; the Eryxias, or Erasistratus; the Alcyon; the Acephali, or Sisyphi; the Axiochus; the Phæacians; the Demodorus; the Chelidon; the Seventh; the Epimenides. Of which the Alcyon is believed to be the work of a man named Leon; as Phavorinus tells us in the seventh book of his Commentaries. XXXVIII. But he employs a great variety of terms in order to render his philosophical system unintelligible to the ignorant. In his phraseology he considers wisdom as the knowledge of things which can be understood by the intellect, and which have a real existence: which has the Gods for its object, and the soul as unconnected with the body. He also, with a peculiarity of expression, calls wisdom also philosophy, which he explains as a desire for divine wisdom. But wisdom and experience are also used by him in their common acceptation; as, for instance, when he calls an artisan wise (σοφὸς). He also uses the same words in different senses at different times. Accordingly he uses φαῦλος in the sense of ἁπλοῦς, _simple_, in which meaning also the word occurs in Euripides, in the Licymonius, where the poet speaks of Hercules in the following terms:— Mean looking (φαῦλος), rude, virtuous in great affairs, Measuring all wisdom by its last results, A hero unrefined in speech. But Plato uses the word sometimes even for what is beautiful; and sometimes for small and insignificant; and very often he uses different words to express the same idea. Accordingly, besides the word ἰδέα for a class, he uses also εἶδος, and γένος, and παράδειγμα, and ἀρχὴ, and αἴτιον. Sometimes he uses opposite expressions for the same thing; accordingly, he says that it is an object of sensation that exists, while at other times he says it is that which does not exist; speaking of it as existing because of its origin, and as non-existent with reference to its continual changes. Then again, he defines his ἰδέα as something which is neither moving nor stationary, at one time calling the same thing, at another time one thing, at a third time many things. And he is in the habit of doing this in many instances. And the explanation of his arguments is three-fold. For first of all, it is necessary to explain what each thing that is said is; secondly, on what account it is said, whether because of its bearing on the principal point, or figuratively, and whether it is said for the purpose of establishing an opinion of his own, or of refuting the arguments brought forward by the other party to the conversation; and thirdly, whether it has been said truly. XXXIX. But since there are some particular marks put in his books, we must also say something about them. × indicates peculiar expressions and figures of speech, and generally any peculiarities of Plato’s style. When doubled it points to the doctrines and peculiar opinions of Plato; ※ when dotted all round, points to some select bits of beautiful writing. When doubled and dotted it indicates corrections of some passages. A dotted obelus indicates hasty disapprovals. An inverted sigma dotted all round points out passages which may be taken in a double sense, and transpositions of words. The Ceraunium[33] indicates a connection of philosophical ideas. An asterisk points out an agreement in doctrine. And an obelus marks the rejection of the expression or of the passage. These then are the marginal marks which occur, and the writings of which Plato was the author:—which, as Antigonus the Carystian says, in his treatise on Zeno, when they had been but lately published, brought in some gain to the possessors, if any one else was desirous of reading them. XL. These now were his chief opinions. He affirmed that the soul was immortal and clothed in many bodies successively, and that its first principle was number, and that the first principle of the body was geometry. And he defined it as an abstract idea of spirit diffused in every direction. He said also, that it was self-moving and threefold. For that that part of it which was capable of reasoning was situated in the head, that that portion which was affected by passion was seated around the heart, and that which was appetitive was placed around the navel and the liver. And that it is placed in the middle of the body, and embraces it at the same time in all its parts, and that it consists of elements; and that when it is divided according to harmonic intervals it forms two connected circles; of which the inner circle is divided into six portions, and makes in all seven circles; and that this is placed on the left hand of the diameter, and situated in the interior. But the other is on the right hand of the same line; on which account, and because it is one only, it is the superior of the two. For the other is divided internally; and this too, is the circle of that which is always the same; the other, the circle of that which is changeable and different. And the one he says is the motion of the soul, but the other is the motion of the universe and of the planets. On the other side, the division of the circles from the centre to the extremities, being harmoniously appropriated to the essence of the soul, the one knows existing things and establishes harmony between them, because it is itself composed of harmonious elements. The circle of what is changeable, engenders opinion by its regular movements; but the circle of that which is always the same produces knowledge. XLI. Plato lays down two primary causes or principles of all things, God and matter, which he also calls mind, and the cause. And he defines matter as something without shape and without limitation, and says that from it all concretions arise. He affirms also that as it was moving about at random, it was brought by God into one settled place, as God thought order better than disorder; and that this nature is divided into four elements, fire, water, air, and earth, of which the world itself and everything in it was made. But he says that the earth is the only thing that is unchangeable, as he considers the cause to be the difference of the figures of which it is composed; for he says that the figures of the others are homogeneous; for that they are all composed equally of scalene triangles. The figure of the earth, however, is peculiar to itself; for the element of fire is a pyramid; of air, an octagon; of water, an eicosagon; and of the earth, a cube; owing to which these things cannot be changed into earth, nor earth into them. He teaches also that these elements are not separated so as to occupy each a peculiar and distinct place; for the spherical motion collects and compresses all the small things towards the centre, and the small things separate the great ones, on which account the species, as they change, do also change their positions. Moreover he asserts that the world is one, and has been produced, since it has been made by God, in such a manner as to be an object of sensation. And he considers it endowed with life, because that which is so endowed, is superior to that which is not, and it must be the production of the most excellent producer. It is also one, and illimitable; because the model after which it was made was one; and it is spherical, because its creator was of that form; for it also contains all other animals, and God who made it comprises all forms. And it is smooth, and has no instruments whatever all round it, because it has no need of any. But the whole world remains imperishable, because it cannot be resolved into God; and God is the cause of universal production, because it is the nature of the good to be productive of good; and the best is the cause of the production of the heaven; for the best of all productions can have no other cause than the best of all intelligible existences. And since God is of that character, and since heaven resembles the best, inasmuch as it is at least the most beautiful of all things, it cannot be like anything else that is produced, except God. He also teaches that the world consists of fire, water, air, and earth; of fire, in order that it may be visible; of earth, in order that it may be firm; of water and air, that it may not be destitute of proportion; for two middle terms are indispensable to keep the solid bodies in due proportion to one another, and to realize the unity of the whole. In short, the world is formed of all the elements together, in order that it may be perfect and imperishable. Again, time is the image of eternity; eternity subsists for ever; but the motion of the heaven is time; for day, and night, and the months, and all such divisions, are parts of time, on which account there could be no such thing as time apart from the nature of the world; for time existed contemporaneously and simultaneously with the world. And it was with reference to time that the sun, and the moon, and the planets were made; and it was in order that the number of the seasons might be manifest, and that the animals might partake of number, that God kindled the light of the sun; and that the moon was above the circle of the earth, and that the sun was next to it, and in the still higher circles were the planets. And that the universe was animated, because it was altogether bound up in animated motion, and that the race of all other animals was produced in order that the world might be made perfect, and resembling an animal such as could be comprehended by intellect. Since then God had life, the heaven also must have life; and the Gods are to a great extent composed of fire. And there are three other races of animals, those which fly in the air; those which live in the water; those which walk in the earth. The oldest of all the deities in heaven is the Earth; she was formed in order to be the dispenser of night and day; and as she is placed in the centre, she is constantly in motion around the centre. And since there are two efficient causes, some things must, he says, be affirmed to exist in consequence of intellect, and some from some necessary cause. Now necessary causes are the air, fire, earth, and water, these not being real elements, but rather receptacles; and they too are formed of triangles in combination, and are resolvable into triangles; and their elements are the scalene triangle and the isosceles. These two before mentioned elements are the principles and causes of things, of which the models are God and matter, which last must necessarily be destitute of form, as is the case of other receptacles. And that the cause of these things was a necessary cause, which, receiving the ideas, produced the substances, and was moved by the dissimilarity of its own power, and again by its motion compelled those things which were moved by it to move other things in their turn. But all these things were formerly moved without any reason or order; but after they began to form the world by their combination, they then received symmetry and regularity from God, according to the principles applicable to them; for the efficient causes, even before the creation of the heaven, were two in number. There was also a third, namely production; but these were not very evident, but rather traces than actual things, and quite devoid of regularity. But after the world was made, then they too assumed a regular form and arrangement; but the heaven was made of all existing bodies. And Plato considers that God is incorporeal just as the soul is, and that it is owing to that that he is not affected by any destruction or external circumstances. And ideas, as