His philosophical reflections are not comprehensive, and do not extend as far as to determination. Diogenes says in the passage quoted before: “He adduced the Infinite” (_τὸ ἄπειρον_, the undetermined), “as principle and element; he neither determined it as air or water or any such thing.” There are, however, few attributes of this Infinite given. (_α_.) “It is the principle of all becoming and passing away; at long intervals infinite worlds or gods rise out of it, and again they pass away into the same.” This has quite an oriental tone. “He gives as a reason that the principle is to be determined as the Infinite, the fact that it does not need material for continuous origination. It contains everything in itself and rules over all: it is divine, immortal, and never passes away.”[23] (_β_.) Out of the one, Anaximander separates the opposites which are contained in it, as do Empedocles and Anaxagoras; thus everything in this medley is certainly there, but undetermined.[24] That is, everything is really contained therein in possibility (_δυνάμει_), “so that,” says Aristotle (Metaphys. XI. 2), “it is not only that everything arises accidentally out of what is not, but everything also arises from what is, although it is from incipient being which is not yet in actuality.” Diogenes Laertius adds (II. 1): “The parts of the Infinite change, but it itself is unchangeable.” (_γ_.) Lastly, it is said that the infinitude is in size and not in number, and Anaximander differs thus from Anaxagoras, Empedocles and the other atomists, who maintain the absolute discretion of the infinite, while Anaximander upholds its absolute continuity.[25] Aristotle (Metaphys. I. 8) speaks also of a principle which is neither water nor air, but is “thicker than air and thinner than water.” Many have connected this idea with Anaximander, and it is possible that it belongs to him. The advance made by the determination of the principle as infinite in comprehensiveness rests in the fact that absolute essence no longer is a simple universal, but one which negates the finite. At the same time, viewed from the material side, Anaximander removes the individuality of the element of water; his objective principle does not appear to be material, and it may be understood as Thought. But it is clear that he did not mean anything else than matter generally, universal matter.[26] Plutarch reproaches Anaximander “for not saying what (_τι_) his infinite is, whether air, water or earth.” But a definite quality such as one of these is transient; matter determined as infinitude means the motion of positing definite forms, and again abolishing the separation. True and infinite Being is to be shown in this and not in negative absence of limit. This universality and negation of the finite is, however, our operation only: in describing matter as infinite, Anaximander does not seem to have said that this is its infinitude.