Артур Шопенгауэр - The World as Will and Idea (Vol. 3 of 3)

It is in conformity with this that in the investigation of organised nature we are entirely referred to final causes , everywhere seek for these and explain everything from them. The efficient causes , on the contrary, here assume only a quite subordinate position as the mere tools of the final causes, and, just as in the case of the voluntary movement of the limbs, which is confessedly effected by external motives, they are rather assumed than pointed out. In explaining the physiological functions we certainly look about for the efficient causes, though for the most part in vain; but in explaining the origin of the parts we again look for them no more, but are satisfied with the final causes alone. At the most we have here some such general principle as that the larger the part is to be the stronger must be the artery that conducts blood to it; but of the actually efficient causes which bring about, for example, the eye, the ear, the brain, we know absolutely nothing. Indeed, even in explaining the mere functions the final cause is far more important and more to the point than the efficient; therefore, if the former alone is known we are instructed and satisfied with regard to the principal matter, while, on the other hand, the efficient cause alone helps us little. For example, if we really knew the efficient cause of the circulation of the blood, as we do not, but still seek it, this would help us little unless we knew the final cause, that the blood must go into the lungs for the purpose of oxidation, and again flow back for the purpose of nourishing; but by the knowledge of this, even without the knowledge of the efficient cause, we have gained much light. Moreover, I am of opinion, as was said above, that the circulation of the blood has no properly efficient cause, but that the will is here as immediately active as in muscular movement where motives determine it by means of nerve conduction, so that here also the movement is called forth directly by the final cause; thus by the need of oxidation in the lungs, which here to a certain extent acts as a motive upon the blood, yet so that the mediation of knowledge is in this case wanting, because everything takes place in the interior of the organism. The so-called metamorphosis of plants, a thought lightly thrown out by Kaspar Wolf, which, under this hyperbolic title, Goethe pompously and with solemn delivery expounds as his own production, belongs to the class of explanations of organic nature from the efficient cause; although ultimately he only says that nature does not in the case of every production begin from the beginning and create out of nothing, but as it were, writing on in the same style, adds on to what already exists, makes use of the earlier forms, developed, and raised to higher power, to carry its work further: just as it has done in the ascending series of animals entirely in accordance with the law: Natura non facit saltus, et quod commodissimum in omnibus suis operationibus sequitur ( Arist. de incessu animalium, c. 2 et 8 ). Indeed, to explain the blossom by pointing out in all its parts the form of the leaf seems to me almost the same as explaining the structure of a house by showing that all its parts, storeys, balconies, and garrets, are only composed of bricks and mere repetitions of the original unity of the brick. And not much better, though much more problematical, seems to me the explanation of the skull from vertebræ, although even here also it is a matter of course that the covering or case of the brain will not be absolutely different and entirely disparate from that of the spinal cord, of which it is the continuation and terminal knob, but will rather be a carrying out of the same kind of thing. This whole method of consideration belongs to the Homology of Richard Owen referred to above. On the other hand, it seems to me that the following explanation of the nature of the flower from its final cause , suggested by an Italian whose name has escaped me, is a far more satisfactory account to give. The end of the corolla is – (1.) Protection of the pistil and the stamina ; (2.) by means of it the purified saps are prepared, which are concentrated in the pollen and germs ; (3.) from the glands of its base the essential oil distils which, for the most part as a fragrant vapour, surrounding the anthers and pistil, protects them to a certain extent from the influence of the damp air. It is also one of the advantages of final causes that every efficient cause always ultimately rests upon something that cannot be fathomed, a force of nature, i. e. , a qualitas occulta , and, therefore, it can only give a relative explanation; while the final cause within its sphere affords a sufficient and perfect explanation. It is true we are only perfectly content when we know both the efficient cause, also called by Aristotle ἡ αιτια εξ αναγκης, and the final cause, ἡ χαριν του βελτιονος, at once and yet separately, as their concurrence, their wonderful working together, then surprises us, and on account of it the best appears as the absolutely necessary, and the necessary again as if it were merely the best and not necessary; for then arises in us the dim perception that both causes, however different may be their origin, are yet connected in the root, in the nature of the thing in itself. But such a twofold knowledge is seldom attainable; in organised nature, because the efficient cause is seldom known to us; in unorganised nature, because the final cause remains problematical. However, I will illustrate this by a couple of examples as good as I find within the range of my physiological knowledge, for which physiologists may be able to substitute clearer and more striking ones. The louse of the negro is black. Final cause: its own safety. Efficient cause: because its nourishment is the black rete Malpighi of the negro. The multifarious, brilliant, and gay colouring of the plumage of tropical birds is explained, although only very generally, from the strong effect of the light in the tropics, as its efficient cause. As the final cause I would assign that those brilliant feathers are the gorgeous uniform in which the individuals of the innumerable species there, often belonging to the same genus, may recognise each other; so that each male may find his female. The same holds good of butterflies of different zones and latitudes. It has been observed that consumptive women, in the last stage of their illness, readily become pregnant, that the disease stops during pregnancy, but after delivery appears again worse than before, and now generally results in death: similarly that consumptive men generally beget another child in the last days of their life. The final cause here is that nature, always so anxiously concerned for the maintenance of the species, seeks to replace by a new individual the approaching loss of one in the prime of life; the efficient cause , on the other hand, is the unusually excited state of the nervous system which occurs in the last period of consumption. From the same final cause is to be explained the analogous phenomenon that (according to Oken, Die Zeugung , p. 65) flies poisoned with arsenic still couple, and die in the act of copulation. The final cause of the pubes in both sexes, and of the Mons Veneris in the female, is that even in the case of very thin subjects the Ossa pubis shall not be felt, which might excite antipathy; the efficient cause, on the other hand, is to be sought in the fact that wherever the mucous membrane passes over to the outer skin, hair grows in the vicinity; and, secondly, also that the head and the genitals are to a certain extent opposite poles of each other, and therefore have various relations and analogies between them, among which is that of being covered with hair. The same efficient cause holds good also of the beard of the man; the final cause of it, I suppose, lies in the fact that the pathogonomic signs, thus the rapid alterations of the countenance betraying every movement of the mind, are principally visible in the mouth and its vicinity; therefore, in order to conceal these from the prying eye of the adversary, as something dangerous in bargaining, or in sudden emergencies, nature gave man the beard (which shows that homo homini lupus ). The woman, on the other hand, could dispense with this; for with her dissimulation and command of countenance are inborn. As I have said, there must be far more apt examples to be found to show how the completely blind working of nature unites in the result with the apparently intentional, or, as Kant calls it, the mechanism of nature with its technic; which points to the fact that both have their common origin beyond their difference in the will as the thing in itself. Much would be achieved for the elucidation of this point of view, if, for example, we could find the efficient cause which carries the driftwood to the treeless polar lands, or that which has concentrated the dry land of our planet principally in the northern half of it; while it is to be regarded as the final cause of this that the winter of that half, because it occurs in the perihelion which accelerates the course of the earth, is eight days shorter, and hereby is also milder. Yet in considering unorganised nature the final cause is always ambiguous, and, especially when the efficient cause is found, leaves us in doubt whether it is not a merely subjective view, an aspect conditioned by our point of view. In this respect, however, it may be compared to many works of art; for example, to coarse mosaics, theatre decorations, and to the god Apennine at Pratolino, near Florence, composed of large masses of rock, all of which only produce their effect at a distance, and vanish when we come near, because instead of them the efficient cause of their appearance now becomes visible: but the forms are yet actually existent, and are no mere imagination. Analogous to this, then, are the final causes in unorganised nature, if the efficient causes appear. Indeed, those who take a wide view of things would perhaps allow it to pass if I added that something similar is the case with omens.