Some may think that we have pushed this point at unnecessary length. But the Neo-Platonic method is not quite so obsolete as they, perhaps, suppose. Whenever we repeat the Nicene and Athanasian Creeds, we are expressing our religious belief in the language of the Alexandrian schools, thus pledging ourselves to metaphysical dogmas which we can neither explain nor defend. Such terms as sonship and procession have no meaning except when applied to relations conceived under the form of time; and to predicate eternity of them is to reduce them to so much unintelligible jargon.
An energy continually advancing through successive gradations, and diminishing as it advances—such, as we have seen, is the conception of existence offered by Plotinus. We have seen, also, how to explain the genesis of one principle from another without the aid of supernatural volition or of mechanical causation, he is compelled to press into the service every sort of relationship by which two objects can be connected, and to invest it with a dynamical significance which only the phenomena of matter and motion can possess. But what he chiefly relies on for guidance in this tortuous labyrinth of timeless evolution, is the old Greek principle that contraries are generated from one another. And with him, as with the earlier thinkers, all contraries reduce themselves, in the last analysis, to the four great antitheses of the One and the Many, Being and not-Being, the Same and the Other, Rest and Motion. It matters nothing that he should have followed Plato to the extent of co-ordinating five of these terms as supreme archetypal Ideas, immediately resulting from the self-consciousness of Nous, and themselves producing all other forms of existence. They are used, quite independently of that derivation, to explain the connexion of the various creative principles with one another. Nous is deduced from its first cause as Being from not-Being, as the Many from the One, as Difference from Identity, and as Motion from Rest.[474] To explain the generation of Soul from Nous is a more difficult problem. The One had originally been defined as the antithetical cause of Nous, and therefore the latter could easily be accounted for by simply reversing the analytical process; whereas Nous had not been defined as the cause of Soul, but as the model whence her creative Ideas are derived. Soul, in fact, is not opposed to anything; she is the connecting link between sense and spirit. In this strait, Plotinus seems to think that the antithesis between Rest and Motion is the best fitted to express the nature of her descent from the higher principle; and on one occasion he illustrates the relation of his three divine substances to one another by the famous figure of a central point representing the One, a fixed circle round that point representing the Nous, and outside that, again, a revolving circle representing the Soul.[475] Still, the different parts of the system are very awkwardly pieced together at this juncture; for the creative energy of the Nous has already been invoked to account for the Ideas or partial intelligences into which it spontaneously divides; and one does not understand how it can be simultaneously applied to the production of something that is not an Idea at all.
Fresh difficulties arise in explaining the activity which the Soul, in her turn, exerts. As originally conceived, her function was sufficiently clear. Mediating between two worlds, she transforms the lower one into a likeness of the higher, stamping on material objects a visible image of the eternal Ideas revealed to her by a contemplation of the Nous. And, as a further elaboration of this scheme, we were told that the primary soul generates an inferior soul, which, again, subdivides itself into the multitude of partial souls required for the animation of different bodily organisms. But now that our philosopher has entered on a synthetic construction of the elements furnished by his preliminary analysis, he finds himself confronted by an entirely new problem. For his implied principle is that each hypostasis must generate the grade which comes next after it in the descending series of manifestations, until the possibilities of existence have been exhausted. But in developing and applying the noetic Ideas, the Soul, apparently, finds a pre-existing Matter ready to hand. Thus she has to deal with something lower than herself, which she did not create, and which is not created by the Forms combined with it in sensible experience. We hear of a descent from thought to feeling, and from feeling to simple vitality,[476] but in each instance the depth of the Soul’s fall is measured by the extent to which she penetrates into the recesses of a substance not clearly related to her nor to anything above her.
Plotinus is driven by this perplexity to reconsider the whole theory of Matter.[477] He takes Aristotle’s doctrine as the groundwork of his investigation. According to this, all existence is divided into Matter and Form. What we know of things—in other words, the sum of their differential characteristics—is their Form. Take away this, and the unknowable residuum is their Matter. Again, Matter is the vague indeterminate something out of which particular Forms are developed. The two are related as Possibility to Actuality, as the more generic to the more specific substance through every grade of classification and composition. Thus there are two Matters, the one sensible and the other intelligible. The former constitutes the common substratum of bodies, the other the common element of ideas.[478] The general distinction between Matter and Form was originally suggested to Aristotle by Plato’s remarks on the same subject; but he differs from his master in two important particulars. Plato, in his Timaeus, seems to identify Matter with space.[479] So far, it is a much more positive conception than the ὕλη of the Metaphysics. On the other hand, he constantly opposes it to reality as something non-existent; and he at least implies that it is opposed to absolute good as a principle of absolute evil.[480] Thus while the Aristotelian world is formed by the development of Power into Actuality, the Platonic world is composed by the union of Being and not-Being, of the Same and the Different, of the One and the Many, of the Limit and the Unlimited, of Good and Evil, in varying proportions with each other.
Plotinus, as we have said, starts with the Aristotelian account of Matter; but by a process of dialectical manipulation, he gradually brings it into almost complete agreement with Plato’s conception; thus, as usual, mediating between and combining the views of his two great authorities. In the first place, he takes advantage of Aristotle’s distinction between intelligible and sensible Matter, to strip the latter of that positive and vital significance with which it had been clothed in the Peripatetic system. In the world of Ideas, there is an element common to all specific forms, a fundamental unity in which they meet and inhere, which may without impropriety be called their Matter. But this Matter is an eternal and divine substance, inseparably united with the fixed forms which it supports, and, therefore, something which, equally with them, receives light and life and thought from the central source of being. It is otherwise with sensible Matter, the common substance of the corporeal elements. This is, to use the energetic expression of our philosopher, a decorated corpse.[481] It does not remain constantly combined with any form, but is for ever passing from one to another, without manifesting a particular preference for any. As such, it is the absolute negation of Form, and can only be conceived, if at all, by thinking away every sensible quality. Neither has it any quantity, for quantity means magnitude, and magnitude implies definite figure. Aristotle opposed to each particular form a corresponding privation, and placed Matter midway between them. Plotinus, on the other hand, identifies Matter with the general privation of all forms. It is at this point that he begins to work his way back to the Platonic notion of Matter as simple extension. There must, after all, be something about Matter which enables it to receive every kind of quality and figure,—it must have some sort of mass or bulk, not, indeed, in any definite sense, but with an equal capacity for expansion and for contraction. Now, says Plotinus, the very indeterminateness of Matter is precisely the capacity for extension in all directions that we require. ‘Having no principle of stability, but being borne towards every form, and easily led about in all directions, it acquires the nature of a mass.’[482]
Henceforth, whatever our philosopher says about Matter will apply to extension and to extension alone. It cannot be apprehended by sight, nor by hearing, nor by smell, nor by taste, for it is neither colour, nor sound, nor odour, nor juice. Neither can it be touched, for it is not a body, but it becomes corporeal on being blended with sensible qualities. And, in a later essay, he describes it as receiving all things and letting them depart again without retaining the slightest trace of their presence.[483] Why then, it may be asked, if Plotinus meant extension, could he not say so at once, and save us all this trouble in hunting out his meaning? There were very good reasons why he should not. In the first place, he wished to express himself, so far as possible, in Aristotelian phraseology, and this was incompatible with the reduction of Matter to extension. In the next place, the idea of an infinite void had been already appropriated by the Epicureans, to whose system he was bitterly opposed. And, finally, the extension of ordinary experience had not the absolute generality which was needed in order to bring Matter into relation with that ultimate abstraction whence, like everything else, it has now to be derived.
As a result of the preceding analysis, Plotinus at last identifies Matter with the Infinite—not an infinite something, but the Infinite pure and simple, apart from any subject of which it can be predicated. We started with what seemed a broad distinction between intelligible and sensible Matter. That distinction now disappears in a new and more comprehensive conception; and, at the same time, Plotinus begins to see his way towards a restatement of his whole system in clearer terms. ‘The Infinite is generated from the infinity or power or eternity of the One; not that there is infinity in the One, but that it is created by the One.’[484] With the first outrush of energy from the primal fount of things, Matter begins to exist. But no sooner do movement and difference start into life, than they are restrained and bent back by the presence of the One; and this reflection of power or being on itself constitutes the supreme self-consciousness of Nous.[485] Whether the subsequent creation of Soul involves a fresh production of energy, or whether a portion of the original stream, which was called into existence by the One, escapes from the restraining self-consciousness of Nous and continues its onward flow—this Plotinus does not say. What he does say is that Soul stands to Nous in the relation of Matter to Form, and is raised to perfection by gazing back on the Ideas contained in Nous, just as Nous itself had been perfected by returning to the One.[486] But while the two higher principles remain stationary, the Soul, besides giving birth to a fresh stream of energy, turns towards her own creation and away from the fountain of her life. And, apparently, it is only by this condescension on her part that the visible world could have been formed.[487] We can explain this by supposing that as the stream of Matter departs more and more from the One, its power of self-reflection continually diminishes, and at length ceases altogether. It is thus that the substratum of sensible objects must, as we have seen, be conceived under the aspect of a passive recipient for the forms imposed on it by the Soul; and just as those forms are a mere image of the noetic Ideas, so also, Plotinus tells us, is their Matter an image of the intelligible Matter which exists in the Nous itself; only the image realises the conception of a material principle more completely than the archetype, because of its more negative and indeterminate nature, a diminution of good being equivalent to an increase of evil.[488]
Still Plotinus gives no clear answer to the question whence comes this last and lowest Matter. He will not say that it is an emanation from the Soul, nor yet will he say that it is a formless residue of the element out of which she was shaped by a return to the Nous. In truth, he could not make up his mind as to whether the Matter of sensible objects was created at all. He oscillates between unwillingness to admit that absolute evil can come from good, and unwillingness to admit that the two are co-ordinate principles of existence. And, as usual, where ideas fail him, he helps himself out of the difficulty with metaphors. The Soul must advance, and in order to advance she must make a place for herself, and that there may be a place there must be body. Or, again, while remaining fixed in herself, she sends out a great light, and by the light she sees that there is darkness beyond its extreme verge, and moulds its formless substance into shape.[489]
The ambiguities and uncertainties which Plotinus exhibits in theorising on the origin of Matter, are due not only to the conflicting influences of Plato and Aristotle, but also to another influence quite distinct from theirs. This is the Stoic cosmology. While utterly repudiating the materialism of the Stoics, Plotinus evidently felt attracted by their severe monism, and by the consistent manner in which they derived every form of existence from the divine substance. They too recognised a distinction between Form and Matter, the active and the passive principle in Nature, but they supposed that the one, besides being penetrated and moulded by the other, had also been originally produced by it. Such a theory was well suited to the energetic and practical character of Stoic morality, with its aversion from mere contemplation, its immediate bearing on the concrete interests of life. Man was conceived as an intelligent force, having for his proper function to bring order out of chaos, ‘to make reason and the will of God prevail,’ and this ideal appeared to be reflected in the dynamic constitution of Nature. With Plotinus, on the other hand, as with Aristotle, theory and not practice was the end of life, or rather, as he himself expressed it, practice was an inferior kind of theorising, an endeavour to set before oneself in outward form what should properly be sought in the noetic world where subject and object are one.[490] Accordingly, while accepting the Stoic monism, he strove to bring it into close agreement with Aristotle’s cosmology, by substituting contemplation for will as the creative principle in all existence, no less than as the ideal of happiness for man.
We have seen how, in accordance with this view, each principle is perfected by looking back on its source.[491] Thus the activity of the world-soul, so far as it is exercised for the benefit of what comes after and falls beneath her, is an anomaly only to be accounted for by her inferior place in the system of graduated descent; or else by the utter impotence of Matter, which is incapable of raising itself into Form by a spontaneous act of reflection, and can only passively receive the images transmitted to it from above, without being able to retain even these for any time. Nay, here also, what looks like creative energy admits of being assimilated more or less closely to an exercise of idealising thought. It is really for her own sake that the Soul fills what lies beyond her with life and light, not, like Plato’s Soul, from pure disinterested joy in the communication and diffusion of good. It is because she recoils with horror from darkness and nonentity that she shapes the formless substance into a residence for herself, on the model of the imperial palace whence she came. Thus the functions of sensation, nutrition, and reproduction are to be regarded as so many modes of contemplation. In the first, the Soul dwells on the material images which already exist; in the second and third, she strives to perpetuate and multiply them still further. And the danger is that she may become so enthralled by her own creation as to forget the divine original after which it is formed.[492] Should she yield to the snare, successive transmigrations will sink her lower and lower into the depths of animalism and material darkness. To avoid this degradation, to energise with the better part of our nature, is to be good. And with the distinction between good and evil, we pass from the metaphysical to the ethical portion of the system.