Part 27

7. (8). Time cannot (as the Stoics claim,[447]) be movement. Neither can we gather together all movements, so as to form but a single one, nor can we consider the regular movement only; for these two kinds of motion are within time. If we were to suppose that there was a movement that did not operate within time, such a movement would still be far removed from being time, since, under this hypothesis, the movement itself is entirely different from that in which the movement occurs. Amidst the many reasons which, in past and present, have been advanced to refute this opinion, a single one suffices: namely, that movement can cease and stop, while time never suspends its flight. To the objection that the movement of the universe never stops, we may answer that this movement, if it consist in the circular movement (of the stars, according to Hestius of Perinthus; or of the sun, according to Eratosthenes[447]) operates within a definite time, at the end of which it returns to the same point of the heavens, but it does not accomplish this within the same space of time taken up in fulfilling the half of its course. One of these movements is only half of the other, and the second is double. Besides, both, the one that runs through half of space, and the one that runs through the whole of it, are movements of the universe. Besides, it has been noticed that the movement of the exterior sphere is the swiftest. This distinction supports our view, for it implies that the movement of this sphere, and the time used to operate it, are different entities; the most rapid movement is the one that takes up the least time, and runs through the greatest amount of space; the slowest movements are those that employ the longest time, and run through only a part of that space.[448]

POLEMIC AGAINST THE PYTHAGOREANS: TIME IS NOT WHAT IS MOVABLE.

On the other hand, if time be not the movement of the sphere, evidently it is far less (than that which is movable, as thought the Pythagoreans,[449]) or (as Pythagoras thought), the sphere (of heaven) itself, as some have thought, because it moves. (This fact alone is sufficient to refute the opinion that confuses time with that which is movable).

POLEMIC AGAINST THE STOIC ZENO: TIME IS NO INTERVAL OF MOVEMENT.

Is time then some part of movement? (Zeno[450]) calls it the interval of movement; but the interval is not the same for all movements, even if the latter were of similar nature; for movements that operate within space may be swifter or slower. It is possible that the intervals of the most rapid and of the slowest movement might be measured by some third interval, which might far more reasonably be considered time. But which of these three intervals shall be called time? Rather, which of all the intervals, infinite in number as they are, shall time be? If time be considered the interval of the regular movement, it will not be the particular interval of every regular movement; otherwise, as there are several regular movements, there would be several kinds of time. If time be defined as the interval of movement of the universe, that is, the interval contained within this movement, it will be nothing else than this movement itself.

PERSISTENT MOVEMENT AND ITS INTERVAL ARE NOT TIME, BUT ARE WITHIN IT.

Besides, this movement is a definite quantity. Either this quantity will be measured by the extension of the space traversed, and the interval will consist in that extension; but that extension is space, and not time. Or we shall say that movement has a certain interval because it is continuous, and that instead of stopping immediately it always becomes prolonged; but this continuity is nothing else than the magnitude (that is, the duration) of the movement. Even though after consideration of a movement it be estimated as great, as might be said of a "great heat"--this does not yet furnish anything in which time might appear and manifest; we have here only a sequence of movements which succeed one another like waves, and only the observed interval between them; now the sequence of movements forms a number, such as two or three; and the interval is an extension. Thus the magnitude of the movement will be a number, say, such as ten; or an interval that manifests in the extension traversed by the movement. Now the notion of time is not revealed herein, but we find only a quantity that is produced within time. Otherwise, time, instead of being everywhere, will exist only in the movement as an attribute in a substrate, which amounts to saying that time is movement; for the interval (of the movement) is not outside of movement, and is only a non-instantaneous movement. If then time be a non-instantaneous movement, just as we often say that some particular instantaneous fact occurs within time, we shall be forced to ask the difference between what is and what is not instantaneous. Do these things differ in relation to time? Then the persisting movement and its interval are not time, but within time.

POLEMIC AGAINST STRATO: TIME IS NOT MOTION AND REST.

Somebody might object that time is indeed the interval of movement, but that it is not the characteristic interval of movement itself, being only the interval in which movement exerts its extension, following along with it. All these terms lack definition. This (extension) is nothing else than the time within which the movement occurs. But that is precisely the question at issue, from the very start. It is as if a person who had been asked to define time should answer "time is the interval of the movement produced within time." What then is this interval called time, when considered outside of the interval characteristic of movement? If the interval characteristic of time be made to consist in movement, where shall the duration of rest be posited? Indeed, for one object to be in motion implies that another (corresponding object) is at rest; now the time of these objects is the same, though for one it be the time of movement, and for the other the time of rest (as thought Strato[451]). What then is the nature of this interval? It cannot be an interval of space, since space is exterior (to the movements that occur within it).

POLEMIC AGAINST ARISTOTLE: TIME IS NOT THE NUMBER AND MEASURE OF MOVEMENT.

8. (9). Let us now examine in what sense it may be said (by Aristotle[452]) that time is the number and measure of movement, which definition seems more reasonable, because of the continuity of movement. To begin with, following the method adopted with the definition of time as "the interval of movement," we might ask whether time be the measure and number of any kind of movement.[453] For how indeed could we give a numerical valuation of unequal or irregular movement. What system of numbering or measurement shall we use for this? If the same measure be applied to slow or to swift movement, in their case measure and number will be the same as the number ten applied equally to horses and oxen; and further, such measure might also be applied to dry and wet substances. If time be a measure of this kind, we clearly see that it is the measure of movements, but we do not discover what it may be in itself. If the number ten can be conceived as a number, after making abstraction of the horses it served to measure, if therefore a measure possess its own individuality, even while no longer measuring anything, the case must be similar with time, inasmuch as it is a measure. If then time be a number in itself, in what does it differ from the number ten, or from any other number composed of unities? As it is a continuous measure, and as it is a quantity, it might, for instance, turn out to be something like a foot-rule. It would then be a magnitude, as, for instance, a line, which follows the movement; but how will this line be able to measure what it follows? Why would it measure one thing rather than another? It seems more reasonable to consider this measure, not as the measure of every kind of movement, but only as the measure of the movement it follows.[452] Then that measure is continuous, so far as the movement it follows itself continue to exist. In this case, we should not consider measure as something exterior, and separated from movement, but as united to the measured movement. What then will measure? Is it the movement that will be measured, and the extension that will measure it? Which of these two things will time be? Will it be the measuring movement, or the measuring extension? Time will be either the movement measured by extension, or the measuring extension; or some third thing which makes use of extension, as one makes use of a foot-rule, to measure the quantity of movement. But in all these cases, we must, as has already been noticed, suppose that movement is uniform; for unless the movement be uniform, one and universal, the theory that movement is a measure of any kind whatever will become almost impossible. If time be "measured movement," that is, measured by quantity--besides granting that it at all needs to be measured--movement must not be measured by itself, but by something different. On the other hand, if movement have a measure different from itself, and if, consequently, we need a continuous measure to measure it, the result would be that extension itself would need measure, so that movement, being measured, may have a quantity which is determined by that of the thing according to which it is measured. Consequently, under this hypothesis, time would be the number of the extension which follows movement, and not extension itself which follows movement.

NOR CAN TIME BE A NUMBERED NUMBER (AS ARISTOTLE CLAIMED[452]).

What is this number? Is it composed of unities? How does it measure? That would still have to be explained. Now let us suppose that we had discovered how it measures; we would still not have discovered the time that measures, but a time that was such or such an amount. Now that is not the same thing as time; there is a difference between time and some particular quantity of time. Before asserting that time has such or such a quantity, we have to discover the nature of that which has that quantity. We may grant that time is the number which measures movement, while remaining exterior thereto, as "ten" is in "ten horses" without being conceived with them (as Aristotle claimed, that it was not a numbering, but a numbered number). But in this case, we still have to discover the nature of this number that, before numbering, is what it is, as would be "ten" considered in itself.[454] It may be said that it is that number which, by following number, measures according to the priority and posteriority of that movement.[452] Nor do we yet perceive the nature of that number which measures by priority and posteriority. In any case, whatever measures by priority or posteriority, or by a present moment,[455] or by anything else, certainly does measure according to time. Thus this number (?) which measures movement according to priority or posteriority, must touch time, and, to measure movement, be related thereto. Prior and posterior necessarily designate either different parts of space, as for instance the beginning of a stadium, or parts of time. What is called priority is time that ends with the present; what is called posteriority, is the time that begins at the present. Time therefore is something different from the number that measures movement according to priority or posteriority,--I do not say, any kind of movement, but still regular movement. Besides, why should we have time by applying number either to what measures, or to what is measured? For in this case these two may be identical. If movement exist along with the priority and posteriority which relate thereto, why will we not have time without number? This would amount to saying that extension has such a quantity only in case of the existence of somebody who recognizes that it possesses that quantity. Since (Aristotle[456]) says that time is infinite, and that it is such effectually, how can it contain number without our taking a portion of time to measure it? From that would result that time existed before it was measured. But why could time not exist before the existence of a soul to measure it? (Aristotle) might have answered that it was begotten by the soul. The mere fact that the soul measures time need not necessarily imply that the soul produced the time; time, along with its suitable quantity, would exist even if nobody measured it. If however it be said that it is the soul that makes use of extension to measure time, we will answer that this is of no importance to determine the notion of time.

POLEMIC AGAINST EPICURUS: TIME IS NOT AN ACCIDENT OR CONSEQUENCE OF MOVEMENT.

9. (10). When (Epicurus[457]) says that time is a consequence of movement, he is not explaining the nature of time; this would demand a preliminary definition of the consequence of movement. Besides, this alleged consequence of movement--granting the possibility of such a consequence--must be prior, simultaneous, or posterior. For, in whatever way we conceive of it, it is within time. Consequently, if the consequence of movement be time, the result would be that time is a consequence of movement in time (which is nonsense).

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.

WHAT ETERNITY IS TO INTELLIGENCE, TIME IS TO THE UNIVERSAL SOUL.

We have already decided that eternity is life characterized by rest, identity, immutability and infinity (in intelligence). It is, further, (admitted that) this our world is the image of the superior World (of intelligence). We have also come to the conclusion that time is the image of eternity. Consequently, corresponding to the Life characteristic of Intelligence, this world must contain another life which bears the same name, and which belongs to that power of the universal Soul. Instead of the movement of Intelligence, we will have the movement characteristic of a part of the soul (as the universal Soul ceaselessly passes from one thought to another). Corresponding to the permanence, identity, and immutability (of Intelligence), we will have the mobility of a principle which ceaselessly passes from one actualization to another. Corresponding to the unity and the absence of all extension, we will have a mere image of unity, an image which exists only by virtue of continuity. Corresponding to an infinity already entirely present, we will have a progression towards infinity which perpetually tends towards what follows. Corresponding to what exists entirely at the same time, we will have what exists by parts, and what will never exist entire at the same time. The soul's existence will have to be ceaseless acquiring of existence; if it is to reveal an image of the complete, universal and infinite existence of the soul; that is the reason its existence is able to represent the intelligible existence.

TIME IS AS INTERIOR TO THE SOUL AS ETERNITY IS TO EXISTENCE.

Time, therefore, is not something external to the soul, any more than eternity is exterior to existence. It is neither a consequence nor a result of it, any more than eternity is a consequence of existence. It appears within the soul, is in her and with her, as eternity is in and with existence.

TIME IS THE LENGTH OF THE LIFE OF THE UNIVERSAL SOUL.

11. (12). The result of the preceding considerations is that time must be conceived of as the length of the life characteristic of the universal Soul; that her course is composed of changes that are equal, uniform, and insensible, so that that course implies a continuity of action. Now let us for a moment suppose that the power of the Soul should cease to act, and to enjoy the life she at present possesses without interruption or limit, because this life is the activity characteristic of an eternal Soul, an action by which the Soul does not return upon herself, and does not concentrate on herself, though enabling her to beget and produce. Now supposing that the Soul should cease to act, that she should apply her superior part to the intelligible world, and to eternity, and that she should there remain calmly united--what then would remain, unless eternity? For what room for succession would that allow, if all things were immovable in unity? How could she contain priority, posteriority, or more or less duration of time? How could the Soul apply herself to some object other than that which occupies her? Further, one could not then even say that she applied herself to the subject that occupied her; she would have to be separated therefrom in order to apply herself thereto. Neither would the universal Sphere exist, since it does not exist before time, because it exists and moves within time. Besides, even if this Sphere were at rest during the activity of the Soul, we could measure the duration of her rest because this rest is posterior to the rest of eternity. Since time is annihilated so soon as the Soul ceases to act, and concentrates in unity, time must be produced by the beginning of the Soul's motion towards sense-objects, by the Soul's life. Consequently (Plato[463]) says that time is born with the universe, because the Soul produced time with the universe; for it is this very action of the Soul which has produced this universe. This action constitutes time, and the universe is within time. Plato does indeed call the movements of the stars, time; but evidently only figuratively, as (Plato) subsequently says that the stars were created to indicate the divisions of time, and to permit us to measure it easily.

TIME IS NOT BEGOTTEN BY MOVEMENT, BUT ONLY INDICATED THEREBY.