It is, in certain respects, quite inexplicable that we should not know the Future. Probably a mere nothing, the displacement of a cerebral lobe, the resetting of Broca's convolution in a different manner, the addition of a slender network of nerves to those which form our consciousness: any one of these would be enough to make the future unfold itself before us with the same clearness, the same majestic amplitude as that with which the past is displayed on the horizon not only of our individual life, but also of the life of the species to which we belong. A singular infirmity, a curious limitation of our intellect causes us not to know what is going to happen to us, when we are fully aware of all that has befallen us. From the absolute point of view to which our imagination succeeds in rising, although it cannot live there, there is no reason why we should not see that which does not yet exist, considering that that which does not yet exist in its relation to us must needs already have its being and manifest itself somewhere. If not, it would have to be said that, where Time is concerned, we form the centre of the world, that we are the only witnesses for whom events wait so that they may have the right to appear and to count in the eternal history of causes and effects. It would be as absurd to assert this for Time as it would be for Space, that other not quite so incomprehensible form of the two-fold infinite mystery in which our whole life floats. Space is more familiar to us, because the accidents of our organism place us more directly in relation with it and make it more concrete. We can move in it pretty freely, in a certain number of directions before and behind us. That is why no traveller would take it into his head to maintain that the towns which he has not yet visited will become real only at the moment when he sets his foot within their walls. Yet this is very nearly what we do when we persuade ourselves that an event which has not yet happened does not yet exist. II But I do not intend, in the wake of so many others, to lose myself in the most insoluble of enigmas. Let us say no more about it, except this alone, that Time is a mystery which we have arbitrarily divided into a Past and a Future, in order to try to understand something of it. In itself we may be almost certain that it is but an immense eternal, motionless Present, in which all that takes place and all that will take place takes place immutably, in which To-Morrow, save in the ephemeral mind of man, is indistinguishable from Yesterday or To-Day.