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The breeding of an animal that can promise—is not this just that very paradox of a task which nature has set itself in regard to man? Is not this the very problem of man? The fact that this problem has been to a great extent solved, must appear all the more phenomenal to one who can estimate at its full value that force of forgetfulness which works in opposition to it. Forgetfulness is no mere vis inertiae, as the superficial believe, rather is it a power of obstruction, active and, in the strictest sense of the word, positive—a power responsible for the fact that what we have lived, experienced, taken into ourselves, no more enters into consciousness during the process of digestion (it might be called psychic absorption) than all the whole manifold process by which our physical nutrition, the so-called “incorporation,” is carried on. The temporary shutting of the doors and windows of consciousness, the relief from the clamant alarums and excursions, with which our subconscious world of servant organs works in mutual cooperation and antagonism; a little quietude, a little tabula rasa of the consciousness, so as to make room again for the new, and above all for the more noble functions and functionaries, room for government, foresight, predetermination (for our organism is on an oligarchic model)—this is the utility, as I have said, of the active forgetfulness, which is a very sentinel and nurse of psychic order, repose, etiquette; and this shows at once why it is that there can exist no happiness, no gladness, no hope, no pride, no real present, without forgetfulness. The man in whom this preventative apparatus is damaged and discarded, is to be compared to a dyspeptic, and it is something more than a comparison—he can “get rid of” nothing. But this very animal who finds it necessary to be forgetful, in whom, in fact, forgetfulness represents a force and a form of robust health, has reared for himself an opposition-power, a memory, with whose help forgetfulness is, in certain instances, kept in check—in the cases, namely, where promises have to be made;—so that it is by no means a mere passive inability to get rid of a once indented impression, not merely the indigestion occasioned by a once pledged word, which one cannot dispose of, but an active refusal to get rid of it, a continuing and a wish to continue what has once been willed, an actual memory of the will; so that between the original “I will,” “I shall do,” and the actual discharge of the will, its act, we can easily interpose a world of new strange phenomena, circumstances, veritable volitions, without the snapping of this long chain of the will. But what is the underlying hypothesis of all this? How thoroughly, in order to be able to regulate the future in this way, must man have first learnt to distinguish between necessitated and accidental phenomena, to think causally, to see the distant as present and to anticipate it, to fix with certainty what is the end, and what is the means to that end; above all, to reckon, to have power to calculate—how thoroughly must man have first become calculable, disciplined, necessitated even for himself and his own conception of himself, that, like a man entering into a promise, he could guarantee himself as a future.