Now this distinction between the real past and the historical past may be fruitful. It may also be treacherous, for the terms in which it is expressed are treacherous terms. For it is very easy to claim that the real past is after all only the historical past, because the past itself being dead and gone is now real only as it is preserved in history. Yet properly understood, the distinction is essential to any philosophical comprehension of what history is. It points out that history is not the past, but is its recovery and conservation. Events begin and end; men are born and die; events and men disappear into the past in a manner and an order which are unalterable. But it is not their disappearance which constitutes their existence in time a history. Their historical existence is a kind of continuing life. It may be that it continues only in human knowledge, but, even so, it clearly illustrates the nature of history as a process in time. In other words the life of knowledge, of memory and imagination, is itself a continual recording of what has happened, a continual understanding of it, and a continual putting of it in a new and enlarged perspective. Here, too, within the narrow limits of man's perceiving and comprehending life to which we have now restricted history, events begin and end, men are born and die, and events and men disappear into the past in a manner and an order which are unalterable. Yet even as they disappear never to return in the precise and identical manner of their first existence, they are conserved, and continue the process of dying as occurrences in order to live as a history. Yesterday as yesterday is gone forever. Its opportunities are over and its incidents dead. As an historical yesterday it lives as material for to-day's employment. It becomes an experience to profit by, a mistake to remedy, or a success to enjoy. History is thus the great destroyer and the great preserver. We must speak of it in apparent paradoxes. The child becomes a man only by ceasing to be a child; Plato becomes an historical figure only by dying; whatever happens is conserved only by being first destroyed.
But the conservation of what happens is obviously not a perpetuation. History is not the staying of events, for time forbids that they stay. The conservation is rather a utilization, a kind of employment or working over of material. Through it discriminations and selections are made and connections discovered; the moving panorama is converted into an order of events which can be understood, because consequences are seen in the light of their antecedents and antecedents are seen in the light of the consequences to which they lead. There is thus a genuine incorporation of what has happened into what does happen, of yesterday into to-day, so that yesterday becomes a vital part of to-day and finds its enlargement and fulfilment there. We can thus write our own biographies. It is possible for us to discover what mistakes we have made and what ends we have attained. Our history appears thus to be a utilization of material, a realization of ends, a movement with purpose in it. Selection is characteristic of it very profoundly. Other histories, of other men, of times, of peoples, of institutions, we write in the same way because in the same way we discover and understand what has happened in their case. Such a destroying, conserving, utilizing, selective, and purposeful movement in time, history appears to be when we restrict it to the domain of human knowledge.
It seems, however, idle so to restrict it. For other things besides our knowledge grow—animals and plants, and the stars even. They, too, have a history, and it may be that their history, being also an affair in time, is not unlike in character to our own growth in knowledge. Or perhaps it were even better to say that both they and our knowledge illustrate equally what history is, discovering time itself to be the great historian. All time-processes, that is, appear to be, when we attentively consider them, processes which supplement, complete, or transform what has gone before. They are active conservations and utilizations of the past as material. They save what has happened from being utterly destroyed, and, in saving it, complete and develop it. Time is, thus, constantly rounding out things, so to speak, or bringing them to some end or fulfilment. That is why we call its movement purposeful.
Yet there have been philosophies which have tried to make of time a magical device by which man might represent to himself in succession that which in itself is never in succession. They picture his journey through life as a journey through space where all that he sees, one thing after another, comes successively into view like the houses on a street along which he may walk. But as the houses do not exist in succession, neither do the facts he discovers. They, too, come into view as he moves along. These philosophies, consequently, would have us think of a world in itself, absolute and complete, to which nothing can be added and from which nothing can be subtracted. It is somehow fixed and finished now; but our human experience, being incomplete and unfinished, gives to it the appearance of a process in time and discloses to us what it would be like if all its factors and the laws which hold them in perfect equilibrium were experienced in succession. History would thus be a kind of temporal revelation of the absolute and we should read it as we read a book, from cover to cover, discovering page by page a story which is itself finished when we begin.
Or philosophy, when it has not conceived the world to be thus finished and complete in itself and only appearing to us as a temporal revelation, has often thought of movements in time as only the results of preceding movements. Whatever happens is thus conceived to be the effect of what has already happened, rather than the active conservation and working over of what has already happened. The past is made the cause and producer of the present, so that the state of the world at any moment is only the result or outcome of what it was in the preceding moment. To-day is thought to be the effect of yesterday and the cause of to-morrow, and is thus but a transition from one day to another. Time-processes are thus robbed of any genuine activity or productivity, and time itself is made to be nothing but the sequential order in which events occur. Purpose, conservation, utilization, and all that active supplementing and working over of the past on which we have dwelt, become illusions when applied to the world at large. They represent our way of conceiving things, but not nature's way of doing things.
But these philosophies, as Professor Bergson especially among recent philosophers has pointed out,[4] gain whatever force they have principally from the fact that they think of time in terms of space. They picture it as a line already drawn, when they should picture it as a line in the process of being drawn. As already drawn, the line has a beginning, an end, and consequently, a middle point. Let us call the middle point the present. All the line to the left of that point we will call the past and all to the right of it the future. We thus behold time spatially with all its parts coexistent as the points on the line. Events are then conceived to move from the past through the present into the future, just as a pencil point may pass from the beginning of the line through its middle point to the end. But, unlike the pencil point, they can not go backward. This fact gives us a characteristic by which we may distinguish time from space even if we have represented time spatially. The spatial order is reversible, the temporal is not. Time is like a line on which you can go forward, but on which you can not go backward. But you can go forward. Everything goes from the past to the future. The present is but the transition point of their going.
There are, undoubtedly, advantages in thinking of time in this spatial way. Thereby we are able to make calendars and have a science of mechanics. It affords a basis for many successful predictions. But, quite evidently, time is neither such a line nor anything like it. Nothing whatever goes from the past through the present into the future. We can not make such a statement intelligible. For "to go" from the past to the future is not like going from New York to Boston. Boston is already there to go to, but the future is not anywhere to go to. And New York is there to leave, but the past is not anywhere to leave. What then is this mysterious "going" if its starting-point and its end are both non-existent now? Clearly it is a "going" only in a metaphorical sense. We call it a "going" because we can so represent it by dates and places. We can say that here we have been going from Friday through Saturday to Sunday. But it is quite clear that to-day is neither past nor future, that it is neither yesterday nor to-morrow, and that if we go anywhere we must start to-day. When Sunday comes, Saturday will be yesterday. But note now the strange situation into which we have fallen—only in the future is this day ever in the past! And that is true of every day in the world's history. It becomes a past day only in its own future.
Clearly then time is not like a line already drawn. It is more like a line in the drawing. You take the pencil and the line is left behind it as the pencil moves. New points are being constantly added to what has gone before. The line is being manufactured. Let us call so much of it as has now been drawn the past and that which has not yet been drawn the future. It is clear then that the present is not the middle point of the line nor any point whatever upon it, for all of the line that has been drawn belongs to the past and all the rest of it to the future. Its past has already been done; its future is not yet done, but only possible. Furthermore, it is clear that no point moves from the past into the future. Such a movement is unintelligible. If there is any movement of points at all, it is a movement into the past. That is, the line, instead of growing into the future, grows into the past—continually more and more of it is drawn. For remember that the future of the line is not the place on the paper or in the air which by and by the line may occupy. Its future is a genuine future, a possibility as yet nowhere realized. It is the part of the line which always will be, but never is; or, better, it is that part of the line which will have a place and a date if the line continues to be drawn. The movement of time is thus not a movement from the past to the future, but from the possible to the actual, from what may be to what has been. The present is not the vanishing point between past and future; it is not, so to speak, in the same line or dimension with them. It is something quite different. It is all that we mean by activity or eventuality. It is the concrete, definite, and effective transforming of the possible into the actual. It is the drawing of the line, but in no sense is it a part or point of the line itself.
There are, doubtless, difficulties in thinking of time in this way, for it is not entirely free from spatial reminiscences. But it serves to point out that past, present, and future are not like parts of a whole into which an absolute or complete time is divided. They are more like derivatives of the time process itself in the concrete instances of its activity. They are what every growing or changing thing involves, whether it be the knowledge of man or the crust of the earth, for everything that grows or changes manufactures a past by realizing a future. It leaves behind it the record of what it has done conserved by memory or by nature, and in leaving that record behind constantly enlarges or transforms it. The growth moves in a manner and an order which when once performed are unalterable, but there is growth none the less. Since time is like this, it seems evidently unintelligible to restrict it and history to human experience and make the world in itself absolute. It would be better to say that it is history in the large sense applicable to the world itself that makes human experience possible. Yet it would be more advisable not to make such a distinction at all, but to recognize that human experience is one kind of history, namely, history conscious of itself, the time process deliberately at work.