ONE:An energy continually advancing through successive gradations, and diminishing as it advancessuch, 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 various323 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.
ONE:The famous theses of Gorgias were quoted in a former chapter as an illustration of the tactics pursued by Greek Humanism in its controversy with physical science. They must be noticed again in the present connexion, on account of their bearing on the development of scepticism, and as having inaugurated a method of reasoning often employed in subsequent attacks, directed, not against the whole of knowledge, but against particular parts of it. The scepticism of Protagoras rested on the assumption that there is an external reality from the reaction of which with mind all our perceptions proceed. Neither of these two factors can be known apart from the other, and as both are in a constant flux, our knowledge of the resulting compound at one time does not show what it has been or will be at another time. But Gorgias altogether denied the existence of any objective reality; and he attempted to disprove it by an analytical instead of a synthetic argument, laying down a series of disjunctive propositions, and upsetting the different alternatives in succession. Existence must be either something or nothing, or both together; and if something, it must be either finite or infinite, or both, and either one or many, or both. His argument against an infinite existence is altogether futile; but it serves to illustrate the undeveloped state of reflection at that period. The eternity of the world is confounded with its unlimited extension in space: and this hypothesis, again, is met by the transparent quibble that the world, not being in any one place, must be nowhere or not at all. And the alternative that the world has not always existed is refuted by the unproved assumption, which, apparently, no Greek philosopher ever thought of disputing, that nothing can begin without being caused by something else. Still, however contemptible such reasonings may seem,131 it is obvious that in them we have the first crude form of the famous antinomies by which Kant long afterwards sought to prove the impossibility of a world existing in space and time apart from a percipient subject, and which have since been used to establish in a more general way the unknowability of existence as such. It will also be observed that the sceptical arguments respectively derived from the relativity of thought and from the contradictions inherent in its ultimate products are run together by modern agnostics. But no reason that we can remember has ever been given to show that an idea is necessarily subjective because it is self-contradictory.
ONE:"What!" Balmayne cried, "were you mad enough to----."Sandy had lost his suspicious look. His interest, as much as that of his older chums, was caught and chained by the coming possibilities and he put down the letter to listen to Jeff.
