18. And yet we speak of a long time and a short time; but never speak this way except of time past and future. We call a hundred years ago, for example, a long time past. In like manner, we should call a hundred years hence a long time to come. But we call ten days ago a short time past; and ten days hence a short time to come. But in what sense is something long or short that is nonexistent? For the past is not now, and the future is not yet. Therefore, let us not say, "It is long"; instead, let us say of the past, "It was long," and of the future, "It will be long." And yet, O Lord, my Light, shall not thy truth make mockery of man even here? For that long time past: was it long when it was already past, or when it was still present? For it might have been long when there was a period that could be long, but when it was past, it no longer was. In that case, that which was not at all could not be long. Let us not, therefore, say, "Time past was long," for we shall not discover what it was that was long because, since it is past, it no longer exists. Rather, let us say that "time present was long, because when it was present it was long." For then it had not yet passed on so as not to be, and therefore it still was in a state that could be called long. But after it passed, it ceased to be long simply because it ceased to be.
19. Let us, therefore, O human soul, see whether present time can be long, for it has been given you to feel and measure the periods of time. How, then, will you answer me?
Is a hundred years when present a long time? But, first, see whether a hundred years can be present at once. For if the first year in the century is current, then it is present time, and the other ninety and nine are still future. Therefore, they are not yet. But, then, if the second year is current, one year is already past, the second present, and all the rest are future. And thus, if we fix on any middle year of this century as present, those before it are past, those after it are future. Therefore, a hundred years cannot be present all at once.
Let us see, then, whether the year that is now current can be present. For if its first month is current, then the rest are future; if the second, the first is already past, and the remainder are not yet. Therefore, the current year is not present all at once. And if it is not present as a whole, then the year is not present. For it takes twelve months to make the year, from which each individual month which is current is itself present one at a time, but the rest are either past or future.
20. Thus it comes out that time present, which we found was the only time that could be called "long," has been cut down to the space of scarcely a single day. But let us examine even that, for one day is never present as a whole. For it is made up of twenty-four hours, divided between night and day. The first of these hours has the rest of them as future, and the last of them has the rest as past; but any of those between has those that preceded it as past and those that succeed it as future. And that one hour itself passes away in fleeting fractions. The part of it that has fled is past; what remains is still future. If any fraction of time be conceived that cannot now be divided even into the most minute momentary point, this alone is what we may call time present. But this flies so rapidly from future to past that it cannot be extended by any delay. For if it is extended, it is then divided into past and future. But the present has no extension whatever.
Where, therefore, is that time which we may call "long"? Is it future? Actually we do not say of the future, "It is long," for it has not yet come to be, so as to be long. Instead, we say, "It will be long." When will it be? For since it is future, it will not be long, for what may be long is not yet. It will be long only when it passes from the future which is not as yet, and will have begun to be present, so that there can be something that may be long. But in that case, time present cries aloud, in the words we have already heard, that it cannot be "long."