PLOTINOS CAN GO NO FURTHER IN REFUTING ENDLESS DEFINITIONS OF TIME.
Now, as our purpose is to discover, not what time is not, but what it really is, we notice that this question has been treated at great length by many thinkers before us; and if we were to undertake to consider all existing opinions on the subject, we would be obliged to write a veritable history of the subject. We have here, however, gone to the limit of our ability in treating it without specializing in it. As has been seen, it is easy enough to refute the opinion that time is the measure of the movement of the universe, and to raise against this opinion the objections that we have raised against the definition of time as the measure of movement in general, opposing thereto the irregularity of movement, and the other points from which suitable arguments may be drawn. We are therefore free to devote ourselves to an explanation of what time really is.
THE NATURE OF TIME WILL BE REVEALED BY ITS ORIGIN.
10. (11). To accomplish this we shall have to return to the nature which, as we pointed out above, was essential to eternity; that immutable life, wholly realized all at once, infinite and perfect, subsisting in, and referring to unity. Time was not yet, or at least, it did not yet exist for the intelligible entities. Only, it was yet to be born of them,[458] because (as was the world), time, by both its reason and nature, was posterior to the (intelligible entities[459]). Are we trying to understand how time issued from among intelligible entities while these were resting within themselves? Here it would be useless to call upon the Muses, for they did not yet exist. Still this might perhaps not be useless; for (in a certain sense, that time had already begun, then, so far as they existed within the sense-world) they existed already. In any case, the birth of time will be plain enough if we consider it only as it is born and manifested. Thus much can be said about it.
TIME AROSE AS MEASUREMENT OF THE ACTIVITY OF THE UNIVERSAL SOUL.
Before priority and posteriority, time, which did not yet exist, brooded within existence itself. But an active nature (the universal Soul), which desired to be mistress of herself, to possess herself, and ceaselessly to add to the present, entered into motion, as did time, along with (the Soul). We achieve a representation of the time that is the image of eternity, by the length that we must go through with to reach what follows, and is posterior, towards one moment, and then towards another.[460]
LIKE TIME, SPACE IS THE RESULT OF THE PROCESSION OF THE UNIVERSAL SOUL.
As the universal Soul contained an activity that agitated her, and impelled her to transport into another world what she still saw on high, she was willing to retain all things that were present at the same time. (Time arose not by a single fiat, but as the result of a process. This occurred within the universal Soul, but may well be first illustrated by the more familiar process within) Reason, which distributes unity, not indeed That which remains within itself, but that which is exterior to itself. Though this process seem to be a strengthening one, reason developing out of the seed in which it brooded unto manifoldness, it is really a weakening (or destructive one), inasmuch as it weakened manifoldness by division, and weakened reason by causing it to extend. The case was similar with the universal Soul. When she produced the sense-world, the latter was animated by a movement which was only an image of intelligible movement. (While trying to strengthen) this image-movement to the extent of the intelligible movement, she herself (weakened), instead of remaining exclusively eternal, became temporal and (involuntarily) subjected what she had produced to the conditions of time, transferring entirely into time not only the universe, but also all its revolutions. Indeed, as the world moves within the universal Soul, which is its location, it also moves within the time that this Soul bears within herself.[461] Manifesting her power in a varied and successive manner, by her mode of action, the universal Soul begat succession. Indeed, she passes from one conception to another, and consequently to what did not exist before, since this conception was not effective, and since the present life of the soul does not resemble her former life. Her life is varied, and from the variety of her life results the variety of time.[462]
TIME IS THE LIFE OF THE SOUL CONSIDERED IN THE MOVEMENT BY WHICH SHE PASSES FROM ONE ACTUALIZATION TO ANOTHER.
Thus, the extension of the life of the soul produces time, and the perpetual progression of her life produces the perpetuity of time, and her former life constitutes the past. We may therefore properly define time as the life of the soul considered in the movement by which she passes from one actualization to another.