To Anaximander this principle was, as he expressed it, the infinite; not water nor any other of the so-called elements, but a different thing from any of them, something hardly namable, out of whose formlessness the heavens and all the worlds in them came to be. And by necessity into that same infinite or indefinite existence, out of which they originally emerged, did every created thing return. Thus, as he poetically expressed it, "Time brought its revenges, and for the wrong-doing of existence all things paid the penalty of death."
The momentary resting-place of Thales on the confines of the familiar world of things, in his formulation of Water as the principle of existence, is thus immediately removed. We get, as it were, to the earliest conception of things as we find it in Genesis; before the heavens were, or earth, or the waters under the earth, or light, or sun, or moon, or grass, or the beast of the field, when the "earth was without form, and void, and darkness was upon the {9} face of the deep." Only, be it observed, that while in the primitive Biblical idea this formless void precedes in time an ordered universe, in Anaximander's conception this formless infinitude is always here, is in fact the only reality which ever is here, something without beginning or ending, underlying all, enwrapping all, governing all.
To modern criticism this may seem to be little better than verbiage, having, perhaps, some possibilities of poetic treatment, but certainly very unsatisfactory if regarded as science. But to this we have to reply that one is not called upon to regard it as science. Behind science, as much to-day when our knowledge of the details of phenomena is so enormously increased, as in the times when science had hardly begun, there lies a world of mystery which we cannot pierce, and yet which we are compelled to assume. No scientific treatise can begin without assuming Matter and Force as data, and however much we may have learned about the relations of forces and the affinities of things, Matter and Force as such remain very much the same dim infinities, that the originative 'Infinite' was to Anaximander.
It is to be noted, however, that while modern science assumes necessarily two correlative data or originative principles,—Force, namely, as well as Matter,—Anaximander seems to have been content {10} with the formulation of but one; and perhaps it is just here that a kinship still remains between him and Thales and other philosophers of the school. He, no more than they, seems to have definitely raised the question, How are we to account for, or formulate, the principle of difference or change? What is it that causes things to come into being out of, or recalls them back from being into, the infinite void? It is to be confessed, however, that our accounts on this point are somewhat conflicting. One authority actually says that he formulated motion as eternal also. So far as he attempted to grasp the idea of difference in relation to that of unity, he seems to have regarded the principle of change or difference as inhering in [13] the infinite itself. Aristotle in this connection contrasts his doctrine with that of Anaxagoras, who formulated two principles of existence—Matter and Mind (see below, p. 54). Anaximander, he points out, found all he wanted in the one.
As a mathematician Anaximander must have been familiar in various aspects with the functions of the Infinite or Indefinable in the organisation of thought. To the student of Euclid, for example, the impossibility of adequately defining any of the fundamental elements of the science of geometry—the point, the line, the surface—is a familiar fact. In so far as a science of geometry is possible at all, the exactness, which is its essential characteristic, is only {11} attainable by starting from data which are in themselves impossible, as of a point which has no magnitude, of a line which has no breadth, of a surface which has no thickness. So in the science of abstract number the fundamental assumptions, as that 1=1, x=x, etc., are contradicted by every fact of experience, for in the world as we know it, absolute equality is simply impossible to discover; and yet these fundamental conceptions are in their development most powerful instruments for the extension of man's command over his own experiences. Their completeness of abstraction from the accidents of experience, from the differences, qualifications, variations which contribute so largely to the personal interests of life, this it is which makes the abstract sciences demonstrative, exact, and universally applicable. In so far, therefore, as we are permitted to grasp the conception of a perfectly abstract existence prior to, and underlying, and enclosing, all separate existences, so far also do we get to a conception which is demonstrative, exact, and universally applicable throughout the whole world of knowable objects.
Such a conception, however, by its absolute emptiness of content, does not afford any means in itself of progression; somehow and somewhere a principle of movement, of development, of concrete reality, must be found or assumed, to link this ultimate abstraction of existence to the multifarious phenomena {12} of existence as known. And it was, perhaps, because Anaximander failed to work out this aspect of the question, that in the subsequent leaders of the school movement, rather than mere existence, was the principle chiefly insisted upon.
Before passing, however, to these successors of Anaximander, some opinions of his which we have not perhaps the means of satisfactorily correlating with his general conception, but which are not without their individual interest, may here be noted. [14] The word husk or bark ((Greek) phloios) seems to have been a favourite one with him, as implying and depicting a conception of interior and necessary development in things. Thus he seems to have postulated an inherent tendency or law in the infinite, which compelled it to develop contrary characters, as hot and cold, dry and moist. In consequence of this fundamental tendency an envelope of fire, he says, came into being, encircling another envelope of air, which latter in turn enveloped the sphere of earth, each being like the 'husk' of the other, or like the bark which encloses the tree. This concentric system he conceives as having in some way been parted up into various systems, represented by the sun, the moon, the stars, and the earth. The last he figured as hanging in space, and deriving its stability from the inherent and perfect balance or relation of its parts.
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Then, again, as to the origin of man, he seems to have in like manner taught a theory of development from lower forms of life. In his view the first living creatures must have come into being in moisture (thus recalling the theory of Thales). As time went on, and these forms of life reached their fuller possibilities, they came to be transferred to the dry land, casting off their old nature like a husk or bark. More particularly he insists that man must have developed out of other and lower forms of life, because of his exceptional need, under present conditions, of care and nursing in his earlier years. Had he come into being at once as a human creature he could never have survived.