Anaxagoras admitted the existence of ultimate elementary particles, as Empedocles did, from the combinations whereof all material phenomena resulted. But he asserted the Moving Force to be Mind; and yet, though he clearly saw the impossibility of advancing by illustration or definition beyond a reasonable faith, or a simple negation of materiality, yet he could not wholly desist from the endeavor to illustrate the nature of this non-matter or mind, by symbols drawn from those physical considerations which decided him in placing it in a separate category. Whether as human reason, or as the regulating Principle in nature, he held it different from all other things in character and effect, and that therefore it must necessarily differ in its essential constitution. It was neither Matter, nor a Force conjoined with matter, or homogeneous with it, but independent and generically distinct, especially in this, that, being the source of all motion, separation, and cognition, it is something entirely unique, pure, and unmixed; and so, being unhindered by any interfering influence limiting its independence of individual action, it has Supreme Empire over all things, over the vortex of worlds as well as over all that live in them. It is most penetrating and powerful, mixing with other things, though no other thing mixes with it; exercises universal control and cognition, and includes the Necessity of the Poets, as well as the independent power of thought which we exercise within ourselves. In short, it is the self-conscious power of thought extended to the Universe, and exalted into the Supreme External Mind which sees, knows, and directs all things.
Thus Pantheism and Materialism were both avoided; and matter, though as infinitely varied as the senses represent it, was held in a bond of unity transferred to a ruling power apart from it. That Power could not be Prime Mover, if it were itself moved; nor All-Governing, if not apart from the things it governs. If the arranging Principle were inherent in matter, it would have been impossible to account for the existence of a chaos: if something external, then the old Ionian doctrine of a "beginning" became more easily conceivable, as being the epoch at which the Arranging Intelligence commenced its operations.
But this grand idea of an all-governing independent mind involved difficulties which proved insuperable; because it gave to matter, in the form of chaos, an independent and eternal self-existence, and so introduced a dualism of mind and matter. In the Mind or Intelligence, Anaxagoras included not only life and motion, but the moral principles of the noble and good; and probably used the term on account of the popular misapplication of the word "God," and as being less liable to misconstruction, and more specifically marking his idea. His "Intelligence" principle remained practically liable to many of the same defects as the "Necessity" of the poets. It was the presentiment of a great idea, which it was for the time impossible to explain or follow out. It was not yet intelligible, nor was even the road opened through which it might be approached.
Mind cannot advance in metaphysics beyond self-deification. In attempting to go further, it only enacts the apotheosis of its own subtle conceptions, and so sinks below the simpler ground already taken. The realities which Plato could not recognize in phenomena, he discovered within his own mind, and as unhesitatingly as the old Theosophists installed its creations among the gods. He, like most philosophers after Anaxagoras, made the Supreme Being to be Intelligence; but in other respects left His nature undefined, or rather indefinite through the variety of definitions, a conception vaguely floating between Theism and Pantheism. Though deprecating the demoralizing tendencies of poetry, he was too wise to attempt to replace them by other representations of a positive kind. He justly says, that spiritual things can be made intelligible only through figures; and the forms of allegorical expression which, in a rude age, had been adopted unconsciously, were designedly chosen by the philosopher as the most appropriate vehicles for theological ideas.
As the devices of symbolism were gradually stripped away, in order, if possible, to reach the fundamental conception, the religious feeling habitually connected with it seemed to evaporate under the process. And yet the advocates of Monotheism, Xenophanes and Heraclitus, declaimed only against the making of gods in human form. They did not attempt to strip nature of its divinity, but rather to recall religious contemplation from an exploded symbolism to a purer one. They continued the veneration which, in the background of poetry, has been maintained for Sun and Stars, the Fire or Ether. Socrates prostrated himself before the rising luminary; and the eternal spheres, which seem to have shared the religious homage of Xenophanes, retained a secondary and qualified Divinity in the Schools of the Peripatetics and Stoics.
The unseen being or beings revealed only to the Intellect became the theme of philosophy; and their more ancient symbols, if not openly discredited, were passed over with evasive generality, as beings respecting whose problematical existence we must be "content with what has been reported by those ancients, who, assuming to be their descendants, must therefore be supposed to have been well acquainted with their own ancestors and family connections." And the Theism of Anaxagoras was still more decidedly subversive, not only of Mythology, but of the whole religion of outward nature; it being an appeal from the world without, to the consciousness of spiritual dignity within man.
In the doctrines of Aristotle, the world moves on uninterruptedly, always changing, yet ever the same, like Time, the Eternal Now, knowing neither repose nor death. There is a principle which makes good the failure of identity, by multiplying resemblances; the destruction of the individual by an eternal renewal of the form in which matter is manifested. This regular eternal movement implies an Eternal Mover; not an inert Eternity, such as the Platonic Eidos, but one always acting, His essence being to act, for otherwise he might never have acted, and the existence of the world would be an accident; for what should have, in that case, decided Him to act, after long inactivity? Nor can He be partly in act and partly potential, that is, quiescent and undetermined to act or not to act, for even in that case motion would not be eternal, but contingent and precarious. He is therefore wholly in act, a pure, untiring activity, and for the same reasons wholly immaterial. Thus Aristotle avoided the idea that God was inactive and self-contemplative for an eternity, and then for some unknown reason, or by some unknown motive, commenced to act outwardly and produce; but he incurred the opposite hazard, of making the result of His action, matter and the Universe, be co-existent with Himself; or, in other words, of denying that there was any time when His outward action commenced.
The First Cause, he said, unmoved, moves all. Act was first, and the Universe has existed forever; one persistent cause directing its continuity. The unity of the First Mover follows from His immateriality. If He were not Himself unmoved, the series of motions and causes of motion would be infinite. Unmoved, therefore, and unchangeable Himself, all movement, even that in space, is caused by Him: He is necessary: He cannot be otherwise than as He is; and it is only through the necessity of His being that we can account for those necessary eternal relations which make a science of Being possible. Thus Aristotle leaned to a seemingly personal God; not a Being of parts and passions, like the God of the Hebrews, or that of the mass even of educated men in our own day, but a Substantial Head of all the categories of being, an Individuality of Intelligence, the dogma of Anaxagoras revived out of a more elaborate and profound analysis of Nature; something like that living unambiguous Principle which the old poets, in advance of the materialistic cosmogonists from Night and Chaos, had discovered in Ouranos or Zeus. Soon, however, the vision of personality is withdrawn, and we reach that culminating point of thought where the real blends with the ideal; where moral action and objective thought (that is, thought exercised as to anything outside of itself), as well as the material body, are excluded; and where the divine action in the world retains its veil of impenetrable mystery, and to the utmost ingenuity of research presents but a contradiction. At this extreme, the series of efficient causes resolves itself into the Final Cause. That which moves, itself _un_moved, can only be the immobility of Thought or Form. God is both formal, efficient, and final cause; the One Form comprising all forms, the one good including all good, the goal of the longing of the University, moving the world as the object of love or rational desire moves the individual. He is the internal or self-realized Final Cause, having no end beyond Himself. He is no moral agent; for if He were, He would be but an instrument for producing something still higher and greater. One sort of act only, activity of mind or thought, can be assigned to Him who is at once all act yet all repose. What we call our highest pleasure, which distinguishes wakefulness and sensation, and which gives a reflected charm to hope and memory, is with Him perpetual. His existence is unbroken enjoyment of that which is most excellent but only temporary with us. The divine quality of active and yet tranquil self-contemplation characterizing intelligence, is pre-eminently possessed by the divine mind; His thought, which is His existence, being, unlike ours, unconditional and wholly act. If He can receive any gratification or enjoyment from that which exists beyond Himself, He can also be displeased and pained with it, and then He would be an imperfect being. To suppose pleasure experienced by Him from anything outward, supposes an insufficient prior enjoyment and happiness, and a sort of dependency. Man's Good is beyond himself; not so God's. The eternal act which produces the world's life is the eternal desire of good. The object of the Absolute Thought is the Absolute Good. Nature is all movement, and Thought all repose. In contemplating that absolute good, the Finality can contemplate only itself; and thus, all material interference being excluded, the distinction of subject and object vanishes in complete identification, and the Divine Thought is "the thinking of thought". The energy of mind is life, and God is that energy in its purity and perfection. He is therefore life itself, eternal and perfect; and this sums up all that is meant by the term "God". And yet, after all this transcendentalism, the very essence of thought consists in its mobility and power of transference from object to object; and we can conceive of no thought, without an object beyond itself, about which to think, or of any activity in mere self-contemplation, without outward act, movement, or manifestation.
Plato endeavors to show how the Divine Principle of Good becomes realized in Nature: Aristotle's system is a vast analogical induction to prove how all Nature tends toward a final good. Plato considered Soul as a principle of movement, and made his Deity realize, that is, turn into realities, his ideas as a free, intelligent Force. Aristotle, for whom Soul is the motionless centre from which motion radiates, and to which it converges, conceives a correspondingly unmoved God. The Deity of Plato creates, superintends, and rejoices in the universal joy of, His creatures. That of Aristotle is the perfection of man's intellectual activity extended to the Universe. When he makes the Deity to be an eternal act of self-contemplation, the world is not excluded from His cognizance, for He contemplates it within Himself. Apart from and beyond the world, He yet mysteriously intermingles with it. He is universal as well as individual; His agency is necessary and general, yet also makes the real and the good of the particular.
When Plato had given to the unformed world the animal life of the Ionians, and added to that the Anaxagorean Intelligence, overruling the wild principle of Necessity; and when to Intelligence was added Beneficence; and the dread Wardours, Force and Strength, were made subordinate to Mildness and Goodness, it seemed as if a further advance were impossible, and that the Deity could not be more than The Wise and The Good.