It may be objected that in science a part is not the total science. Doubtless, the notion which is actualized, and which is studied to the exclusion of others, because there is special need of it, is only partially an actualization. Nevertheless, in a latent manner it potentially comprises all the other notions it implies. Thus, all the notions are contained in each part of the science, and in this respect each part is the total science; for what is only partially actualized (potentially) comprises all the notions of science. Each notion that one wishes to render explicit is at one's disposition; and this in every part of the science that is considered; but if it be compared with the whole science, it seems to be there only potentially. It must not, however, be thought that the particular notion does not contain anything of the other notions; in this case, there would be nothing systematic or scientific about it; it would be nothing more than a sterile conception. Being a really scientific notion, it potentially contains all the notions of the science; and the genuine scientist knows how to discover all its notions in a single one, and how to develop its consequences. The geometrical expert shows in his demonstrations how each theorem contains all the preceding ones, to which he harks back by analysis, and how each theorem leads to all the following ones, by deduction.
DIFFICULT AS THESE EXPLANATIONS ARE, THEY ARE CLEAR INTELLIGIBLY.
These truths excite our incredulity, because here below our reason is weak, and it is confused by the body. In the intelligible world, however, all the verities are clear, and each is evident, by itself.
[SIXTH ENNEAD, BOOK NINE.]
Of the Good and the One.
UNITY NECESSARY TO EXISTENCE OF ALL BEINGS.
1. All beings, both primary, as well as those who are so called on any pretext soever, are beings only because of their unity. What, indeed would they be without it? Deprived of their unity, they would cease to be what they are said to be. No army can exist unless it be one. So with a choric ballet or a flock. Neither a house nor a ship can exist without unity; by losing it they would cease to be what they are.[187] So also with continuous quantities which would not exist without unity. On being divided by losing their unity, they simultaneously lose their nature. Consider farther the bodies of plants and animals, of which each is a unity. On losing their unity by being broken up into several parts, they simultaneously lose their nature. They are no more what they were, they have become new beings, which themselves exist only so long as they are one. What effects health in us, is that the parts of our bodies are co-ordinated in unity. Beauty is formed by the unity of our members. Virtue is our soul's tendency to unity, and becoming one through the harmony of her faculties.
THE SOUL MAY IMPART UNITY, BUT IS NOT UNITY.
The soul imparts unity to all things when producing them, fashioning them, and forming them. Should we, therefore, after rising to the Soul, say that she not only imparts unity, but herself is unity in itself? Certainly not. The soul that imparts form and figure to bodies is not identical with form, and figure. Therefore the soul imparts unity without being unity. She unifies each of her productions only by contemplation of the One, just as she produces man only by contemplating Man-in-himself, although adding to that idea the implied unity. Each of the things that are called "one" have a unity proportionate to their nature ("being"); so that they participate in unity more or less according as they share essence[188] (being). Thus the soul is something different from unity; nevertheless, as she exists in a degree higher (than the body), she participates more in unity, without being unity itself; indeed she is one, but the unity in her is no more than contingent. There is a difference between the soul and unity, just as between the body and unity. A discrete quantity such as a company of dancers, or choric ballet, is very far from being unity; a continuous quantity approximates that further; the soul gets still nearer to it, and participates therein still more. Thus from the fact that the soul could not exist without being one, the identity between the soul and unity is suggested. But this may be answered in two ways. First, other things also possess individual existence because they possess unity, and nevertheless are not unity itself; as, though the body is not identical with unity, it also participates in unity. Further, the soul is manifold as well as one, though she be not composed of parts. She possesses several faculties, discursive reason, desire, and perception—all of them faculties joined together by unity as a bond. Doubtless the soul imparts unity to something else (the body), because she herself possesses unity; but this unity is by her received from some other principle (namely, from unity itself).