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.