For the rest, this power of deliberation which man possesses is one of those things that makes his existence so much more miserable than that of the brute. For in general our greatest sufferings do not lie in the present as ideas of perception or as immediate feelings; but in the reason, as abstract conceptions, painful thoughts, from which the brute, which lives only in the present, and therefore in enviable carelessness, is entirely free. It seems to have been the dependence, which we have shown, of the human power of deliberation upon the faculty of abstract thinking, and thus also of judging and drawing conclusions also, that led both Descartes and Spinoza to identify the decisions of the will with the faculty of asserting and denying (the faculty of judgment). From this Descartes deduced the doctrine that the will, which, according to him, is indifferently free, is the source of sin, and also of all theoretical error. And Spinoza, on the other hand, concluded that the will is necessarily determined by the motives, as the judgment is by the reasons.(70) The latter doctrine is in a sense true, but it appears as a true conclusion from false premises. The distinction we have established between the ways in which the brutes and man are respectively moved by motives exerts a very wide influence upon the nature of both, and has most to do with the complete and obvious differences of their existence. While an idea of perception is in every case the motive which determines the brute, the man strives to exclude this kind of motivation altogether, and to determine himself entirely by abstract ideas. Thus he uses his prerogative of reason to the greatest possible advantage. Independent of the present, he neither chooses nor avoids the passing pleasure or pain, but reflects on the consequences of both. In most cases, setting aside quite insignificant actions, we are determined by abstract, thought motives, not present impressions. Therefore all particular privation for the moment is for us comparatively light, but all renunciation is terribly hard; for the former only concerns the fleeting present, but the latter concerns the future, and includes in itself innumerable privations, of which it is the equivalent. The causes of our pain, as of our pleasure, lie for the most part, not in the real present, but merely in abstract thoughts. It is these which are often unbearable to us—inflict torments in comparison with which all the sufferings of the animal world are very small; for even our own physical pain is not felt at all when they are present. Indeed, in the case of keen mental suffering, we even inflict physical suffering on ourselves merely to distract our attention from the former to the latter. This is why, in great mental anguish, men tear their hair, beat their breasts, lacerate their faces, or roll on the floor, for all these are in reality only violent means of diverting the mind from an unbearable thought. Just