Introduction to the Philosophy and Writings of Plato | Page 7

being alone, but others to be nourished and increased, and to generate things similar to themselves. There is therefore another certain cause prior to the above-mentioned nature, viz. a vegetable power itself. But it is evident that all such things as are ingenerated in body as in a subject, are of themselves incorporeal, though they become corporeal by the participation of that in which they subsist, so that they are said to be and are material in consequence of what they suffer from matter. Qualities therefore, and still more natures, and in a still greater degree the vegetable life, preserve the incorporeal in themselves. Since however, sense exhibits another more conspicuous life, pertaining to beings which are moved according to impulse and place, this must be established prior to that, as being a more proper principle, and as the supplier of a certain better form, that of a self-moved animal, and which naturally precedes plants rooted in the earth. The animal however, is not accurately self-moved. For the whole is not such throughout they whole; but a part moves and a part is moved. This therefore is the apparent self-moved. Hence, prior to this it is necessary there should be that which is truly self-moved, and which according to the whole of itself moves ands is moved, that the apparently self-moved may be the image of this. And indeed the soul which moves the body must be considered as a more proper self-moved essence. This, however, is twofold, the one rational, the other irrational. For that there is a rational soul is evident: or has not every one a cosensation of himself, more clear or more obscure, when converted to himself in the attentions to and investigations of himself, and in the vital and Gnostic animadversions of himself? For the essence which is capable of this, and which can collect universals by reasoning, will very justly be rational. The irrational soul also, though it does not appear to investigate these things, and to reason with itself, yet at the same time it moves bodies from place to place, being itself previously moved from itself; for at different times it exerts a different impulse. Does it therefore move itself from one impulse to another? or it is moved by something else, as, for instance, by the whole rational soul in the universe? But it would be absurd to say that the energies of every irrational soul are not the energies of that soul, but of one more divine; since they are infinite, and mingled with much of the base and imperfect. For this would be just the same as to say that the irrational enemies are the energies of the rational soul. I omit to mention the absurdity of supposing that the whole essence is not generative of its proper energies. For if the irrational soul is a certain essence, it will have peculiar energies of its own, not imparted from something else, but proceeding from itself. This irrational soul, therefore, will also move itself at different times to different impulses. But if it moves itself, it will be converted to itself. If, however, this be the case, it will have a separate subsistence, and will not be in a subject. It is therefore rational, if it looks to itself: for in being converted to, it surveys itself. For when extended to things external, it looks to externals, or rather it looks to colored body, but does not see itself, because sight itself is neither body nor that which is colored. Hence it does not revert to itself. Neither therefore is this the case with any other irrational nature. For neither does the phantasy project a type of itself, but of that which is sensible, as for instance of colored body. Nor does irrational appetite desire itself, but aspires after a certain object of desire, such as honor, or pleasure, or riches. It does not therefore move itself.
But if some one, on seeing that brutes exert rational energies, should apprehend that these also participate of the first self-moved, and on this account possess a soul converted to itself, it may perhaps be granted to him that these also are rational natures, except that they are not so essentially, but according to participation, and this most obscure, just as the rational soul may be said to be intellectual according to participation, as always projecting common conceptions without distortion. It must however be observed, that the extreme are that which is capable of being perfectly separated, such as the rational form, and that which is perfectly inseparable, such as corporeal quality, and that in the middle of these nature subsists, which verges to the inseparable, having a small representation of the separable and the irrational soul, which verges to the separable; or it