THREE:After disposing of the Stoic materialism, according to which the soul, though distinct from the body, is, equally with it, an extended and resisting substance, our philosopher proceeds to discuss the theories which make it a property or function of the body. The Pythagorean notion of the soul as a harmony of the body is met by a reproduction of the well-known arguments used against it in Platos Phaedo. Then comes the Aristotelian doctrine that the soul is the entelechythat is to say, the realised purpose and perfectionof the physical organism to which it belongs. This is an idea which Aristotle himself had failed to make very clear, and the inadequacy of which he had virtually acknowledged by ascribing a different origin to reason, although this is counted as one of the psychic faculties. Plotinus, at any rate, could not appreciate an explanation which, whatever else it implied, certainly involved a considerable departure from his own dualistic interpretation of the difference between spirit and matter. He could not enter into Aristotles view of the one as a lower and less concentrated form of the other. The same arguments which had already been employed against Stoicism are now turned against the Peripatetic psychology. The soul as a principle, not only of memory and desire, but even of nutrition, is declared to be independent of and separable from the body. And, finally, as a result of the whole controversy, its immortality is affirmed. But how far this immortality involves the belief in a prolongation of personal existence after death, is a point297 which still remains uncertain. We shall return to the question in dealing with the religious opinions of Plotinus.Such arguments manifestly tell not only against Platonism, but against every kind of transcendental realism, from the natural theology of Paley to the dogmatic agnosticism of Mr. Herbert Spencer. A modern Aristotle might say that the hypothesis of a creative first cause, personal or otherwise, logically involves the assumption of as many original specific energies as there are qualities to be accounted for, and thus gives us the unnecessary trouble of counting everything twice over; that every difficulty and contradiction from which the transcendental assumption is intended to free us, must, on analysis, reappear in the assumption itselffor example, the God who is to deliver us from evil must be himself conceived as the creator of evil; that the infinite and absolute can neither cause, nor be apprehended by, the finite and relative; that to separate from Nature all the forces required for its perpetuation, and relegate them to a sphere apart, is a false antithesis and a sterile abstraction; lastly, that causation, whether efficient or final, once begun, cannot stop; that if this world is not self-existing, nothing is; that the mutual adaptation of thoughts in a designing intelligence requires to be accounted for just like any other adaptation; that if the relative involves the absolute, so also does the relation between the two involve another absolute, and so on to infinity.
