Chapter XXIV.--That Time is Not a Motion of a Body Which We Measure by Time.
31. Dost Thou command that I should assent, if any one should say that time is "the motion of a body?" Thou dost not command me. For I hear that no body is moved but in time. This Thou sayest; but that the very motion of a body is time, I hear not; Thou sayest it not. For when a body is moved, I by time measure how long it may be moving from the time in which it began to be moved till it left off. And if I saw not whence it began, and it continued to be moved, so that I see not when it leaves off, I cannot measure unless, perchance, from the time I began until I cease to see. But if I look long, I only proclaim that the time is long, but not how long it may be because when we say, "How long," we speak by comparison, as, "This is as long as that," or, "This is double as long as that," or any other thing of the kind. But if we were able to note down the distances of places whence and whither cometh the body which is moved, or its parts, if it moved as in a wheel, we can say in how much time the motion of the body or its part, from this place unto that, was performed. Since, then, the motion of a body is one thing, that by which we measure how long it is another, who cannot see which of these is rather to be called time? For, although a body be sometimes moved, sometimes stand still, we measure not its motion only, but also its standing still, by time; and we say, "It stood still as much as it moved;" or, "It stood still twice or thrice as long as it moved;" and if any other space which our measuring hath either determined or imagined, more or less, as we are accustomed to say. Time, therefore, is not the motion of a body.
Chapter XXV.--He Calls on God to Enlighten His Mind.
32. And I confess unto Thee, O Lord, that I am as yet ignorant as to what time is, and again I confess unto Thee, O Lord, that I know that I speak these things in time, and that I have already long spoken of time, and that very "long" is not long save by the stay of time. How, then, know I this, when I know not what time is? Or is it, perchance, that I know not in what wise I may express what I know? Alas for me, that I do not at least know the extent of my own ignorance! Behold, O my God, before Thee I lie not. As I speak, so is my heart. Thou shalt light my candle; Thou, O Lord my God, wilt enlighten my darkness.
[1051] Ps. viii. 28.
Chapter XXVI.--We Measure Longer Events by Shorter in Time.
33. Doth not my soul pour out unto Thee truly in confession that I do measure times? But do I thus measure, O my God, and know not what I measure? I measure the motion of a body by time; and the time itself do I not measure? But, in truth, could I measure the motion of a body, how long it is, and how long it is in coming from this place to that, unless I should measure the time in which it is moved? How, therefore, do I measure this very time itself? Or do we by a shorter time measure a longer, as by the space of a cubit the space of a crossbeam? For thus, indeed, we seem by the space of a short syllable to measure the space of a long syllable, and to say that this is double. Thus we measure the spaces of stanzas by the spaces of the verses, and the spaces of the verses by the spaces of the feet, and the spaces of the feet by the spaces of the syllables, and the spaces of long by the spaces of short syllables; not measuring by pages (for in that manner we measure spaces, not times), but when in uttering the words they pass by, and we say, "It is a long stanza because it is made up of so many verses; long verses, because they consist of so many feet; long feet, because they are prolonged by so many syllables; a long syllable, because double a short one." But neither thus is any certain measure of time obtained; since it is possible that a shorter verse, if it be pronounced more fully, may take up more time than a longer one, if pronounced more hurriedly. Thus for a stanzas, thus for a foot, thus for a syllable. Whence it appeared to me that time is nothing else than protraction; but of what I know not. It is wonderful to me, if it be not of the mind itself. For what do I measure, I beseech Thee, O my God, even when I say either indefinitely, "This time is longer than that;" or even definitely, "This is double that?" That I measure time, I know. But I measure not the future, for it is not yet; nor do I measure the present, because it is extended by no space; nor do I measure the past, because it no longer is. What, therefore, do I measure? Is it times passing, not past? For thus had I said.