Now Anaximander was a hearer of Thales. He was Anaximander of Miletus, son of Praxiades.[54] He said that the beginning of the things that are was a certain nature of the Boundless from which came into being the heavens and the ordered worlds[55] within them. And that this principle is eternal and grows not old and encompasses all the ordered worlds. And he says time is limited by birth, p. 17. substance,[56] and death. He said that the Boundless is a principle and element of the things that are and was the first to call it by the name of principle. But that there is an eternal movement towards Him wherein it happens that the heavens are born. And that the earth is a heavenly body[57] supported by nothing, but remaining in its place by reason of its equal distance from everything. And that its form is a watery cylinder[58] like a stone pillar; and that we tread on one of its surfaces, but that there is another opposite to it. And that the stars are a circle of fire distinct from the fire in the cosmos, but surrounded by air. And that certain fiery exhalations exist in those places where the stars appear, and by the obstruction of these exhalations come the eclipses. And that the moon appears sometimes waxing and sometimes waning through the obstruction or closing of her paths. And that the circle of the sun is 27 times greater than that of the moon and that the sun is in the highest place in the heavens and the circles of the fixed p. 18. stars in the lowest. And that the animals came into being in moisture evaporated by the sun. And that mankind was at the beginning very like another animal, to wit, a fish. And that winds come from the separation and condensation of the subtler atoms of the air[59] and rain from the earth giving back under the sun’s heat what it gets from the clouds,[60] and lightnings from the severance of the clouds by the winds falling upon them. He was born in the 3rd year of the 42nd Olympiad.[61]

6. About Anaximenes.

Anaximenes, who was also a Milesian, the son of Eurystratus, said that the beginning was a boundless air from which what was, is, and shall be and gods and divine things came into being, while the rest came from their descendants. But that the condition of the air is such that when it is all over alike[62] it is invisible to the eye, but it is made perceptible by cold and heat, by damp and by motion. And that it is ever-moving, for whatever is changeable[63] changes not unless it be moved. For it appears different when condensed and rarefied. For when it diffuses into greater rarity fire is produced; but when again halfway p. 19. condensed into air, a cloud is formed from the air’s compression; and when still further condensed, water, and when condensed to the full, earth; and when to the very highest degree, stones. And that consequently the great rulers of formation are contraries, to wit, heat and cold. And that the earth is a flat surface borne up on the air in the same way as the sun and moon and the other stars.[64] For all fiery things are carried through the air laterally.[65] And that the stars are produced from the earth by reason of the mist which rises from it and which when rarefied becomes fire, and from this ascending fire[66] the stars are constructed. And that there are earth-like natures in the stars’ place carried about with them. But he says that the stars do not move under the earth, as others assume, but round the earth[67] as a cap is turned on one’s head, and that the sun is hidden, not because it is under the earth, but because it is hidden by the earth’s higher parts, and by reason of its greater distance from us. And because of their great distance, the stars give out no heat. And that p. 20. winds are produced when the air after condensation escapes rarefied; but that when it collects and is thus condensed[68] to the full, it becomes clouds and thus changes into water. Also that hail is produced when the water brought down from the clouds is frozen; and snow when the same clouds are wetter when freezing. And lightning come when the clouds are forced apart by the strength of the winds; for when thus driven apart, there is a brilliant and fiery flash. Also that a rainbow is produced by the solar rays falling upon solidified air, and an earthquake from the earth’s increasing in size by heating and cooling. This then Anaximenes. He flourished about the 1st year of the 58th Olympiad.[69]

7. About Anaxagoras.

After him was Anaxagoras of Clazomene, son of Hegesibulus. He said that the beginning of the universe was mind and matter, mind being the creator and matter that which came unto being.[70] For that when all things were together, mind came and arranged them. He says, however, that the material principles are boundless, even the smallest of them. And that all things partake of movement, being p. 21. moved by mind, and that like things come together. And that the things in heaven were set in order by their circular motion.[71] That therefore what was dense and moist and dark and cold and everything heavy came together in the middle, and from the compacting of this the earth was established;[72] but that the opposites, to wit, the hot, the brilliant and the light were drawn off to the distant æther. Also that the earth is fat in shape and remains suspended[73] through its great size, and from there being no void and because the air which is strongest bears (up) the upheld earth. And that the sea exists from the moisture on the earth and the waters in it evaporating and then condensing in a hollow place;[74] and that the sea is supposed to have come into being by this and from the rivers flowing into it. And the rivers, too, are established by the rains and the waters within the earth; for the earth is hollow and holds water in its cavities. But that the Nile increases in summer when the snows from the northern parts are carried down into it. And that the sun and moon and all the stars are burning stones and are p. 22. carried about by the rotation of the æther. And that below the stars are the sun and moon and certain bodies not seen by us whirled round together. And that the heat of the stars is not felt by us because of their great distance from the earth; but yet their heat is not like that of the sun from their occupying a colder region. Also that the moon is below the sun and nearer to us; and that the size of the sun is greater than that of the Peloponnesus. And that the moon has no light of her own, but only one from the sun. And that the revolution of the stars takes place under the earth. Also that the moon is eclipsed when the earth stands in her way, and sometimes the stars which are below the moon,[75] and the sun when the moon stands in his way during new moons. And that both the sun and moon make turnings (solstices) when driven back by the air; but that the moon turns often through not being able to master the cold. He was the first to determine the facts about eclipses and renewals of light.[76] And he said that the moon was like the earth and had within it plains and ravines. And that the Milky Way was the reflection of the light of the stars which are not lighted up by the sun. And that the shooting stars p. 23. are as it were sparks which glance off from the movement of the pole. And that winds are produced by the rarefaction of the air by the sun and by their drying up as they get towards the pole and are borne away from it. And that thunderstorms are produced by heat falling upon the clouds. And that earthquakes come from the upper air falling upon that under the earth; for when this last is moved, the earth upheld by it is shaken. And that animals at the beginning were produced from water, but thereafter from one another, and that males are born when the seed secreted from the right parts of the body adheres to the right parts of the womb and females when the opposite occurs. He flourished in the 1st year of the 88th Olympiad, about which time they say Plato was born.[77] They say also that Anaxagoras came to have a knowledge of the future.

8. About Archelaus.

Archelaus was of Athenian race and the son of Apollodorus. He like Anaxagoras asserted the mixed nature of matter and agreed with him as to the beginning of things. But he said that a certain mixture[78] was directly inherent in mind, and that the source of movement is the separation from one another of heat and cold and that the p. 24. heat is moved and the cold remains undisturbed. Also that water when heated flows to the middle of the universe wherein heated air and earth are produced, of which one is borne aloft while the other remains below. And that the earth remains fixed and exists because of this and abides in the middle of the universe, of which, so to speak, it forms no part and which is delivered from the conflagration.[79] The first result of which burning is the nature of the stars, the greatest whereof is the sun and the second the moon while of the others some are greater and some smaller. And he says that the heaven is arched over us[80] and has made the air transparent and the earth dry. For that at first it was a pool; since it was lofty at the horizon, but hollow in the middle. And he brings forward as a proof of this hollowness, that the sun does not rise and set at the same time for all parts as must happen if the earth were level. And as to animals, he says that the earth first became heated in the lower part when the hot and cold mingled and man[81] and the other animals appeared. And all things were unlike p. 25. one another and had the same diet, being nourished on mud. And this endured for a little, but at last generation from one another arose, and man became distinct from the other animals and set up chiefs, laws, arts, cities and the rest. And he says that mind is inborn in all animals alike. For that every body is supplied with[82] mind, some more slowly and some quicker than the others.

Natural philosophy lasted then from Thales up to Archelaus. Of this last Socrates was a hearer. But there are also many others putting forward different tenets concerning the Divine and the nature of the universe, whose opinions if we wished to set them all out would take a great mass of books. But it would be best, after having recalled by name those of them who are, so to speak, the chorus-leaders of all who philosophized in later times and who have furnished starting-points for systems, to hasten on to what follows.[83]

9. About Parmenides.

p. 26.For truly Parmenides also supposed the universe to be eternal and ungenerated and spherical in form.[84] Nor did he avoid the common opinion making fire and earth the principles of the universe, the earth as matter, but the fire as cause and creator. [He said that the ordered world would be destroyed, but in what way, he did not say.][85] But he said that the universe was eternal and ungenerated and spherical in form and all over alike, bearing no impress and immoveable and with definite limits.