13. Nearly all we know of Anaximander’s system is derived in the last resort from Theophrastos.[[99]] As to the credibility of what we are told on his authority, it is enough to remark that the original work, which was in the hands of Apollodoros, must certainly have existed in the time of Theophrastos. Moreover, he seems once at least to have quoted Anaximander’s own words, and he criticised his style. Here are the remains of what he said of him in the First Book:—
Anaximander of Miletos, son of Praxiades, a fellow-citizen and associate of Thales,[[100]] said that the material cause and first element of things was the Infinite, he being the first to introduce this name for the material cause. He says it is neither water nor any other of the so-called[[101]] elements, but a substance different from them which is infinite, from which arise all the heavens and the worlds within them.—Phys. Op. fr. 2 (Dox. p. 476; R. P. 16).
He says that this is eternal and ageless, and that it encompasses all the worlds.—Hipp. Ref. i. 6 (R. P. 17 a).
And into that from which things take their rise they pass away once more, “as is ordained; for they make reparation and satisfaction to one another for their injustice according to the appointed time,” as he says[[102]] in these somewhat poetical terms.—Phys. Op. fr. 2 (R. P. 16).
And besides this, there was an eternal motion, in the course of which was brought about the origin of the worlds.—Hipp. Ref. i. 6 (R. P. 17 a).
He did not ascribe the origin of things to any alteration in matter, but said that the oppositions in the substratum, which was a boundless body, were separated out.—Simpl. Phys. p. 150, 20 (R. P. 18).
The primary substance is not one of the “elements.”
14. Anaximander taught, then, that there was one eternal, indestructible substance out of which everything arises, and into which everything once more returns; a boundless stock from which the waste of existence is continually being made good. This is only the natural development of the thought we have ventured to ascribe to Thales, and there can be no doubt that Anaximander at least distinctly formulated it. Indeed, we can still follow to some extent the reasoning which led him to do so. Thales had regarded water as the most likely of all the things we know to be that of which all others are forms; Anaximander appears to have asked himself how the primary substance could be one of these particular things. His argument seems to be preserved by Aristotle, who has the following passage in his discussion of the Infinite:—
Further, there cannot be a single, simple body which is infinite, either, as some hold, one distinct from the elements, which they then derive from it, nor without this qualification. For there are some who make this (i.e. a body distinct from the elements) the infinite, and not air or water, in order that the other things may not be destroyed by their infinity. They are in opposition one to another—air is cold, water moist, and fire hot—and therefore, if any one of them were infinite, the rest would have ceased to be by this time. Accordingly they say that what is infinite is something other than the elements, and from it the elements arise.—Arist. Phys. Γ, 5. 204 b 22 (R. P. 16 b).
It is clear that in this passage Anaximander is contrasted with Thales and with Anaximenes. Nor is there any reason to doubt that the account given of his reasoning is substantially correct, though the form is Aristotle’s own, and the mention of “elements” is an anachronism.[[103]] Anaximander was struck, it would seem, by the opposition and strife between the things which go to make up the world; the warm fire was opposed to the cold air, the dry earth to the moist sea. These opposites were at war, and any predominance of one over the other was an “injustice” for which they must make reparation to one another.[[104]] We may suppose that his thoughts ran somewhat as follows. If Thales had been right in saying that water was the fundamental reality, it would not be easy to see how anything else could ever have existed. One side of the opposition, the cold and moist, would have had its way unchecked, injustice would have prevailed, and the warm and dry would have been driven from the field long ago. We must, then, have something which is not itself one of the warring opposites we know, something more primitive, out of which they arise, and into which they once more pass away. That Anaximander called this something by the name of φύσις, is clear from the doxographers; the current statement that the word ἀρχή in the sense of a “first principle” was introduced by him, is probably due to a misunderstanding of what Theophrastos said.[[105]]