What is time?

 

One of the earliest, and most famous, discussions of the nature and experience of time occurs in the autobiographical Confessions of St Augustine. Augustine was born in Numidia (now Algeria) in 354 AD, held chairs in rhetoric at Carthage and Milan, and become Bishop of Hippo in 395. He died in 430. As a young adult, he had rejected Christianity, but was finally converted at the age of 32. Book XI of the Confessions contains a long and fascinating exploration of time, and its relation to God. During the course of it Augustine raises the following conundrum: when we say that an event or interval of time is short or long, what is it that is being described as of short or long duration? It cannot be what is past, since that has ceased to be, and what is non-existent cannot presently have any properties, such as being long. But neither can it be what is present, for the present has no duration. (For the reason why the present must be regarded as durationless, see the section on the specious present, below.) In any case, while an event is still going on, its duration cannot be assessed.

Augustine's answer to this riddle is that what we are measuring, when we measure the duration of an event or interval of time, is in the memory. From this he derives the radical conclusion that past and future exist only in the mind. While not following Augustine all the way to the mind-dependence of other times, we can concede that the perception of temporal duration is crucially bound up with memory. It is some feature of our memory of the event (and perhaps specifically our memory of the beginning and end of the event) that allows us to form a belief about its duration. This process need not be described, as Augustine describes it, as a matter of measuring something wholly in the mind. Arguably, at least, we are measuring the event or interval itself, a mind-independent item, but doing so by means of some psychological process.

Retrieved from http://plato.stanford.edu/entries/time-experience/

 

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The following is excerpted from Moore and Bruder, p 79.

 

The ex nihilo theory (God created the world out of nothing) invites a troublesome question for Christian theology: Why did God choose to create the world at the time he did and not at some other? Thanks to Plato and Plotinus, Augustine was able to provide a potentially reasonable answer to this question. 

According to Augustine, the question rests on a false assumption that God (and his actions) exists within time. On the contrary, Augustine maintained, God does not exist in time; instead, time began with the creation by God of the world. God is beyond time. In this way the timeless attribute of that Plato’s Good and Plotinus’s One was transferred by Augustine to the Christian God

But what exactly, Augustine wondered, is time? Here Augustine broke new philosophical ground by coming forth with a very tempting answer to question

 “What, then, is time?” he asked. “If no one asks of me, I know; if I wish to explain to him who asks, I know not.” On one hand, only the present exists for the past is no more, and the future is not yet. But, on the other hand, certain things did happen in the past, and other things will happen in the future, and thus past and future are quite real. How can the past and the future be both real and nonexistent?

 Augustine’s answer to this almost hopelessly baffling question is that past and future exist only in the human mind.  “The present of things past is a memory; the present of things present is sight; the present of things future is expectation.”

Augustine’s analysis of time is that it is a subjective phenomenon. It exists “only in the mind (Thus, before God created us, there was no time.)   As will be discussed in Chapter 7, the idea that time is subjective was later developed by the eighteenth century philosopher Immanuel into the theory that time, space, causation, other basic “categories” of being are all subjective impositions of the mind on the world. The same idea was then carried to its ultimate conclusion by the Absolute Idealists, who said that the world is mind.

 

Readings in St. Augustine’s Confessions in which he develops some of his thoughts on the nature of time.

Chapter I.—By Confession He Desires to Stimulate Towards God His Own Love and That of His Readers.

1. O Lord, since eternity is Thine, art Thou ignorant of the things which I say unto Thee? Or seest Thou at the time that which cometh to pass in time? Why, therefore, do I place before Thee so many relations of things? Not surely that Thou mightest know them through me, but that I may awaken my own love and that of my readers towards Thee, that we may all say, “Great is the Lord, and greatly to be praised.”999 I have already said, and shall say, for the love of Thy love do I this. For we also pray, and yet Truth says, “Your Father knoweth what things ye have need of before ye ask Him.”1000 Therefore do we make known unto Thee our love, in confessing unto Thee our own miseries and Thy mercies upon us, that Thou mayest free us altogether, since Thou hast begun, that we may cease to be wretched in ourselves, and that we may be blessed in Thee; since Thou hast called us, that we may be poor in spirit, and meek, and mourners, and hungering and athirst after righteousness, and merciful, and pure in heart, and peacemakers.1001 Behold, I have told unto Thee many things, which I could and which I would, for Thou first wouldest that I should confess unto Thee, the Lord my God, for Thou art good, since Thy “mercy endureth for ever.

 

 

Chapter VI.—He Did Not, However, Create It by a Sounding and Passing Word.

8. But how didst Thou speak? Was it in that manner in which the voice came from the cloud, saying, “This is my beloved Son”?1031 For that voice was uttered and passed away, began and ended. The syllables sounded and passed by, the second after the first, the third after the second, and thence in order, until the last after the rest, and silence after the last. Hence it is clear and plain that the motion of a creature expressed it, itself temporal, obeying Thy Eternal will. And these thy words formed at the time, the outer ear conveyed to the intelligent mind, whose inner ear lay attentive to Thy eternal word. But it compared these words sounding in time with Thy eternal word in silence, and said, “It is different, very different. These words are far beneath me, nor are they, since they flee and pass away; but the Word of my Lord remaineth above me for ever.” If, then, in sounding and fleeting words Thou didst say that heaven and earth should be made, and didst thus make heaven and earth, there was already a corporeal creature before heaven and earth by whose temporal motions that voice might take its course in time. But there was nothing corporeal before heaven and earth; or if there were, certainly Thou without a transitory voice hadst created that whence Thou wouldest make the passing voice, by which to say that the heaven and the earth should be made. For whatsoever that were of which such a voice was made, unless it were made by Thee, it could not be at all. By what word of Thine was it decreed that a body might be made, whereby these words might be made?

 

Chapter XI.—They Who Ask This Have Not as Yet Known the Eternity of God, Which is Exempt from the Relation of Time.

13. Those who say these things do not as yet understand Thee, O Thou Wisdom of God, Thou light of souls; not as yet do they understand how these things be made which are made by and in Thee. They even endeavour to comprehend things eternal; but as yet their heart flieth about in the past and future motions of things, and is still wavering. Who shall hold it and fix it, that it may rest a little, and by degrees catch the glory of that everstanding eternity, and compare it with the times which never stand, and see that it is incomparable; and that a long time cannot become long, save from the many motions that pass by, which cannot at the same instant be prolonged; but that in the Eternal nothing passeth away, but that the whole is present; but no time is wholly present; and let him see that all time past is forced on by the future, and that all the future followeth from the past, and that all, both past and future, is created and issues from that which is always present? Who will hold the heart of man, that it may stand still, and see how the still-standing eternity, itself neither future nor past, uttereth the times future and past? Can my hand accomplish this, or the hand of my mouth by persuasion bring about a thing so great?1039

 

Chapter XIII.—Before the Times Created by God, Times Were Not.

15. But if the roving thought of any one should wander through the images of bygone time, and wonder that Thou, the God Almighty, and All-creating, and All-sustaining, the Architect of heaven and earth, didst for innumerable ages refrain from so great a work before Thou wouldst make it, let him awake and consider that he wonders at false things. For whence could innumerable ages pass by which Thou didst not make, since Thou art the Author and Creator of all ages? Or what times should those be which were not made by Thee? Or how should they pass by if they had not been? Since, therefore, Thou art the Creator of all times, if any time was before Thou madest heaven and earth, why is it said that Thou didst refrain from working? For that very time Thou madest, nor could times pass by before Thou madest times. But if before heaven and earth there was no time, why is it asked, What didst Thou then? For there was no “then” when time was not.

16. Nor dost Thou by time precede time; else wouldest not Thou precede all times. But in the excellency of an ever-present eternity, Thou precedest all times past, and survivest all future times, because they are future, and when they have come they will be past; but “Thou art the same, and Thy years shall have no end.” Thy years neither go nor come; but ours both go and come, that all may come. All Thy years stand at once since they do stand; nor were they when departing excluded by coming years, because they pass not away; but all these of ours shall be when all shall cease to be. Thy years are one day, and Thy day is not daily, but today; because Thy today yields not with tomorrow, for neither doth it follow yesterday. Thy today is eternity; therefore didst Thou beget the Co-eternal, to whom Thou saidst, “This day have I begotten Thee.” Thou hast made all time; and before all times Thou art, nor in any time was there not time.

 

Chapter XIV.—Neither Time Past Nor Future, But the Present Only, Really is.

17. At no time, therefore, hadst Thou not made anything, because Thou hadst made time itself. And no times are co-eternal with Thee, because Thou remainest for ever; but should these continue, they would not be times. For what is time? Who can easily and briefly explain it? Who even in thought can comprehend it, even to the pronouncing of a word concerning it? But what in speaking do we refer to more familiarly and knowingly than time? And certainly we understand when we speak of it; we understand also when we hear it spoken of by another. What, then, is time? If no one ask of me, I know; if I wish to explain to him who asks, I know not. Yet I say with confidence, that I know that if nothing passed away, there would not be past time; and if nothing were coming, there would not be future time; and if nothing were, there would not be present time. Those two times, therefore, past and future, how are they, when even the past now is not; and the future is not as yet? But should the present be always present, and should it not pass into time past, time truly it could not be, but eternity. If, then, time present—if it be time—only comes into existence because it passes into time past, how do we say that even this is, whose cause of being is that it shall not be—namely, so that we cannot truly say that time is, unless because it tends not to be?

 

Chapter XV.—There is Only a Moment of Present Time.

18. And yet we say that “time is long and time is short;” nor do we speak of this save of time past and future. A long time past, for example, we call a hundred years ago; in like manner a long time to come, a hundred years hence. But a short time past we call, say, ten days ago: and a short time to come, ten days hence. But in what sense is that long or short which is not? For the past is not now, and the future is not yet. Therefore let us not say, “It is long;” but let us say of the past, “It hath been long,” and of the future, “It will be long.” O my Lord, my light, shall not even here Thy truth deride man? For that past time which was long, was it long when it was already past, or when it was as yet present? For then it might be long when there was that which could be long, but when past it no longer was; wherefore that could not be long which was not at all. Let us not, therefore, say, “Time past hath been long;” for we shall not find what may have been long, seeing that since it was past it is not; but let us say “that present time was long, because when it was present it was long.” For it had not as yet passed away so as not to be, and therefore there was that which could be long. But after it passed, that ceased also to be long which ceased to be.

19. Let us therefore see, O human soul, whether present time can be long; for to thee is it given to perceive and to measure periods of time. What wilt thou reply to me? Is a hundred years when present a long time? See, first, whether a hundred years can be present. For if the first year of these is current, that is present, but the other ninety and nine are future, and therefore they are not as yet. But if the second year is current, one is already past, the other present, the rest future. And thus, if we fix on any middle year of this hundred as present, those before it are past, those after it are future; wherefore a hundred years cannot be present. See at least whether that year itself which is current can be present. For if its first month be current, the rest are future; if the second, the first hath already passed, and the remainder are not yet. Therefore neither is the year which is current as a whole present; and if it is not present as a whole, then the year is not present. For twelve months make the year, of which each individual month which is current is itself present, but the rest are either past or future. Although neither is that month which is current present, but one day only: if the first, the rest being to come, if the last, the rest being past; if any of the middle, then between past and future.

20. Behold, the present time, which alone we found could be called long, is abridged to the space scarcely of one day. But let us discuss even that, for there is not one day present as a whole. For it is made up of four-and-twenty hours of night and day, whereof the first hath the rest future, the last hath them past, but any one of the intervening hath those before it past, those after it future. And that one hour passeth away in fleeting particles. Whatever of it hath flown away is past, whatever remaineth is future. If any portion of time be conceived which cannot now be divided into even the minutest particles of moments, this only is that which may be called present; which, however, flies so rapidly from future to past, that it cannot be extended by any delay. For if it be extended, it is divided into the past and future; but the present hath no space. Where, therefore, is the time which we may call long? Is it nature? Indeed we do not say, “It is long,” because it is not yet, so as to be long; but we say, “It will be long.” When, then, will it be? For if even then, since as yet it is future, it will not be long, because what may be long is not as yet; but it shall be long, when from the future, which as yet is not, it shall already have begun to be, and will have become present, so that there could be that which may be long; then doth the present time cry out in the words above that it cannot be long.

 

Retrieved from http://www.ccel.org/print/schaff/npnf101/vi.XI.XV

 

 

Última modificación: lunes, 13 de agosto de 2018, 11:43