If we consider the will, where no one denies it, in conscious beings, we find everywhere, as its fundamental effort, the self-preservation of every being: omnis natura vult esse conservatrix sui. But all manifestations of this fundamental effort may constantly be traced back to a seeking or pursuit and a shunning or fleeing from, according to the occasion. Now this also may be shown even at the lowest grades of nature, that is, of the objectification of the will, where the bodies still act only as bodies in general, thus are the subject-matter of mechanics, and are considered only with reference to the manifestations of impenetrability, cohesion, rigidity, elasticity, and gravity. Here also the seeking shows itself as gravitation, and the shunning as the receiving of motion; and the movableness of bodies by pressure or impact, which constitutes the basis of mechanics, is at bottom a manifestation of the effort after self-preservation, which dwells in them also. For, since as bodies they are impenetrable, this is the sole means of preserving their cohesion, thus their continuance at any time. The body which is impelled or exposed to pressure would be crushed to pieces by the impelling or pressing body if it did not withdraw itself from its power by flight, in order to preserve its cohesion; and when flight is impossible for it this actually happens. Indeed, one may regard elastic bodies as the more courageous, which seek to repel the enemy, or at least to prevent him from pursuing further. Thus in the one secret which (besides gravity) is left by mechanics otherwise so clear, in the communicability of motion, we see a manifestation of the fundamental effort of the will in all its phenomena, the effort after self-preservation, which shows itself even at the lowest grades as that which is essential.
In unorganised nature the will objectifies itself primarily in the universal forces, and only by means of these in the phenomena of the particular things which are called forth by causes. In § 26 of the first volume I have fully explained the relation between cause, force of nature, and will as thing in itself. One sees from that explanation that metaphysics never interrupts the course of physics, but only takes up the thread where physics leaves it, at the original forces in which all causal explanation has its limits. Only here does the metaphysical explanation from the will as the thing in itself begin. In the case of every physical phenomenon, of every change of material things, its cause is primarily to be looked for; and this cause is just such a particular change which has appeared immediately before it. Then, however, the original force of nature is to be sought by virtue of which this cause was capable of acting. And first of all the will is to be recognised as the inner nature of this force in opposition to its manifestation. Yet the will shows itself just as directly in the fall of a stone as in the action of the man; the difference is only that its particular manifestation is in the one case called forth by a motive, in the other by a mechanically acting cause, for example, the taking away of what supported the stone; yet in both cases with equal necessity; and that in the one case it depends upon an individual character, in the other upon an universal force of nature. This identity of what is fundamentally essential is even made palpable to the senses. If, for instance, we carefully observe a body which has lost its equilibrium, and on account of its special form rolls back and forward for a long time till it finds its centre of gravity again, a certain appearance of life forces itself upon us, and we directly feel that something analogous to the foundation of life is also active here. This is certainly the universal force of nature, which, however, in itself identical with the will, becomes here, as it were, the soul of a very brief quasi life. Thus what is identical in the two extremes of the manifestation of the will makes itself faintly known here even to direct perception, in that this raises a feeling in us that here also something entirely original, such as we only know in the acts of our own will, directly succeeded in manifesting itself.
We may attain to an intuitive knowledge of the existence and activity of the will in unorganised nature in quite a different and a sublime manner if we study the problem of the three heavenly bodies, and thus learn more accurately and specially the course of the moon round the earth. By the different combinations which the constant change of the position of these three heavenly bodies towards each other introduces, the course of the moon is now accelerated; now retarded, now it approaches the earth, and again recedes from it; and this again takes place differently in the perihelion of the earth from in its aphelion, all of which together introduces such irregularity into the moon's course that it really obtains a capricious appearance; for, indeed, Kepler's third law is no longer constantly valid, but in equal times it describes unequal areas. The consideration of this course is a small and separate chapter of celestial mechanics, which is distinguished in a sublime manner from terrestrial mechanics by the absence of all impact and pressure, thus of the vis a tergo which appears to us so intelligible, and indeed of the actually completed case, for besides vis inertiœ it knows no other moving and directing force, except only gravitation, that longing for union which proceeds from the very inner nature of bodies. If now we construct for ourselves in imagination the working of this given case in detail, we recognise distinctly and directly in the moving force here that which is given to us in self-consciousness as will. For the alterations in the course of the earth and the moon, according as one of them is by its position more or less exposed to the influence of the sun, are evidently analogous to the influence of newly appearing motives upon our wills, and to the modifications of our action which result.
The following is an illustrative example of another kind. Liebig (Chemie in Anwendung auf Agrikultur, p. 501), says: “If we bring moist copper into air which contains carbonic acid, the affinity of the metal for the oxygen of the air will be increased by the contact with this acid to such a degree that the two will combine with each other; its surface will be coated with green carbonic oxide of copper. But now two bodies which have the capacity of combining, the moment they meet assume opposite electrical conditions. Therefore if we touch the copper with iron, by producing a special electrical state, the capacity of the copper to enter into combination with the oxygen is destroyed; even under the above conditions it remains bright.” The fact is well known and of technical use. I quote it in order to say that here the will of the copper, laid claim to and occupied by the electrical opposition to iron, leaves unused the opportunity which presents itself for its chemical affinity for oxygen and carbonic acid. Accordingly it conducts itself exactly as the will in a man who omits an action which he would otherwise feel himself moved to in order to perform another to which a stronger motive urges him.
I have shown in the first volume that the forces of nature lie outside the chain of causes and effects, because they constitute their accompanying condition, their metaphysical foundation, and therefore prove themselves to be eternal and omnipresent, i. e., independent of time and space. Even in the uncontested truth that what is essential to a cause as such consists in this, that it will produce the same effect at any future time as it does now, it is already involved that something lies in the cause which is independent of the course of time, i. e., is outside of all time; this is the force of nature which manifests itself in it. One can even convince oneself to a certain extent empirically and as a matter of fact of the ideality of this form of our perception by fixing one's eyes upon the powerlessness of time as opposed to natural forces. If, for example, a rotatory motion is imparted to a planet by some external cause, if no new cause enters to stop it, this motion will endure for ever. This could not be so if time were something in itself and had an objective, real existence; for then it would necessarily also produce some effect. Thus we see here, on the one hand, the forces of nature, which manifest themselves in that rotation, and, if it is once begun, carry it on for ever without becoming weary or dying out, prove themselves to be eternal or timeless, and consequently absolutely real and existing in themselves; and, on the other hand, time as something which consists only in the manner in which we apprehend that phenomenon, since it exerts no power and no influence upon the phenomenon itself; for what does not act is not.
We have a natural inclination whenever it is possible to explain every natural phenomenon mechanically; doubtless because mechanics calls in the assistance of the fewest original, and hence inexplicable, forces, and, on the other hand, contains much that can be known a priori, and therefore depends upon the forms of our own intellect, which as such carries with it the highest degree of comprehensibility and clearness. However, in the “Metaphysical First Principles of Natural Science” Kant has referred mechanical activity itself to a dynamical activity. On the other hand, the application of mechanical explanatory hypotheses, beyond what is demonstrably mechanical, to which, for example, Acoustics also belongs, is entirely unjustified, and I will never believe that even the simplest chemical combination or the difference of the three states of aggregation will ever admit of mechanical explanation, much less the properties of light, of heat, and electricity. These will always admit only of a dynamical explanation, i. e., one which explains the phenomenon from original forces which are entirely different from those of impact, pressure, weight, &c., and are therefore of a higher kind, i. e., are more distinct objectifications of that will which obtains visible form in all things. I am of opinion that light is neither an emanation nor a vibration; both views are akin to that which explains transparency from pores and the evident falseness of which is proved by the fact that light is subject to no mechanical laws. In order to obtain direct conviction of this one only requires to watch the effects of a storm of wind, which bends, upsets, and scatters everything, but during which a ray of light shooting down from a break in the clouds is entirely undisturbed and steadier than a rock, so that with great directness it imparts to us the knowledge that it belongs to another order of things than the mechanical: it stands there unmoved like a ghost. Those constructions of light from molecules and atoms which have originated with the French are indeed a revolting absurdity. An article by Ampère, who is otherwise so acute, upon light and heat, which is to be found in the April number of the “Annales de chimie et physique,” of 1835, may be considered as a flagrant expression of this, and indeed of the whole of atomism in general. There the solid, the fluid, and the elastic consist of the same atoms, and all differences arise solely from their aggregation; nay, it is said that space indeed is infinitely divisible, but not matter; because, if the division has been carried as far as the atoms, the further division must fall in the spaces between the atoms! Light and heat, then, are here vibrations of the atoms; and sound, on the other hand, is a vibration of the molecules composed of the atoms. In truth, however, these atoms are a fixed idea of the French savants, and therefore they just speak of them as if they had seen them. Otherwise one would necessarily marvel that such a matter-of-fact nation as the French can hold so firmly to a completely transcendent hypothesis, which is quite beyond the possibility of experience, and confidently build upon it up to the sky. This is just a consequence of the backward state of the metaphysics they shun so much, which is poorly represented by M. Cousin, who, with all good will, is shallow and very scantily endowed with judgment. At bottom they are still Lockeians, owing to the earlier influence of Condillac. Therefore for them the thing in itself is really matter, from the fundamental properties of which, such as impenetrability, form, hardness, and the other primary qualities, everything in the world must be ultimately explicable. They will not let themselves be talked out of this, and their tacit assumption is that matter can only be moved by mechanical forces. In Germany Kant's teaching has prevented the continuance of the absurdities of the atomistic and purely mechanical physics for any length of time; although at the present moment these views prevail here also, which is a consequence of the shallowness, crudeness, and folly introduced by Hegel. However, it cannot be denied that not only the evidently porous nature of natural bodies, but also two special doctrines of modern physics, apparently render assistance to the atomic nuisance. These are, Hauz's Crystallography, which traces every crystal back to its kernel form, which is an ultimate form, though only relatively indivisible; and Berzelius's doctrine of chemical atoms, which are yet mere expressions for combining proportions, thus only arithmetical quantities, and at bottom nothing more than counters. On the other hand, Kant's thesis in the second antinomy in defence of atoms, which is certainly only set up for dialectical purposes, is a mere sophism, as I have proved in my criticism of his philosophy, and our understanding itself by no means leads us necessarily to the assumption of atoms. For just as little as I am obliged to think that the slow but constant and uniform motion of a body before my eyes is composed of innumerable motions which are absolutely quick, but broken and interrupted by just as many absolutely short moments of rest, but, on the contrary, know very well that the stone that has been thrown flies more slowly than the projected bullet, yet never pauses for an instant on the way, so little am I obliged to think of the mass of a body as consisting of atoms and the spaces between them, i. e., of absolute density and absolute vacuity; but I comprehend those two phenomena without difficulty as constant continua, one of which uniformly fills time and the other space. But just as the one motion may yet be quicker than another, i. e., in an equal time can pass through more space, so also one body may have a greater specific gravity than another, i. e., in equal space may contain more matter: in both cases the difference depends upon the intensity of the acting force; for Kant (following Priestley) has quite correctly reduced matter to forces. But even if the analogy here set up should not be admitted as valid, and it should be insisted upon that the difference of specific gravity can only have its ground in porosity, even this assumption would always lead, not to atoms, but only to a perfectly dense matter, unequally distributed among different bodies; a matter which would certainly be no longer compressible, when no pores ran through it, but yet, like the space which it fills, would always remain infinitely divisible. For the fact that it would have no pores by no means involves that no possible force could do away with the continuity of its spatial parts. For to say that everywhere this is only possible by extending the already existing intervals is a purely arbitrary assertion.
The assumption of atoms rests upon the two phenomena which have been touched upon, the difference of the specific gravity of bodies and that of their compressibility, for both are conveniently explained by the assumption of atoms. But then both must also always be present in like measure, which is by no means the case. For, for example, water has a far lower specific gravity than all metals properly so called. It must thus have fewer atoms and greater interstices between them, and consequently be very compressible: but it is almost entirely incompressible.
The defence of atoms might be conducted in this way. One may start from porosity and say something of this sort: All bodies have pores, and therefore so also have all parts of a body: now if this were carried out to infinity, there would ultimately be nothing left of a body but pores. The refutation would be that what remained over would certainly have to be assumed as without pores, and so far as absolutely dense, yet not on that account as consisting of absolutely indivisible particles, atoms; accordingly it would certainly be absolutely incompressible, but not absolutely indivisible. It would therefore be necessary that it should be asserted that the division of a body is only possible by penetrating into its pores; which, however, is entirely unproved. If, however, this is assumed, then we certainly have atoms, i. e., absolutely indivisible bodies, thus bodies of such strong cohesion of their spatial parts that no possible power can separate them: but then one may just as well assume such bodies to be large as small, and an atom might be as big as an ox, if it only would resist all possible attacks upon it.
Imagine two bodies of very different kinds, entirely freed from all pores by compression, as by means of hammering, or by pulverisation; – would their specific gravity then be the same? This would be the criterion of dynamics.
Chapter XXIV. On Matter
Matter has already been spoken of in the fourth chapter of the supplements to the first book, when we were considering the part of our knowledge of which we are conscious a priori. But it could only be considered there from a one-sided point of view, because we were then concerned merely with its relation to the forms of our intellect, and not to the thing in itself, and therefore we investigated it only from the subjective side, i. e., so far as it is an idea, and not from the objective side, i. e., with regard to what it may be in itself. In the first respect, our conclusion was that it is objective activity in general, yet conceived without fuller determination; therefore it takes the place of causality in the table of our a priori knowledge which is given there. For what is material is that which acts (the actual) in general, and regarded apart from the specific nature of its action. Hence also matter, merely as such, is not an object of perception, but only of thought, and thus is really an abstraction. It only comes into perception in connection with form and quality, as a body, i. e., as a fully determined kind of activity. It is only by abstracting from this fuller determination that we think of matter as such, i. e., separated from form and quality; consequently under matter we think of acting absolutely and in general, thus of activity in the abstract. The more fully determined acting we then conceive as the accident of matter; but only by means of this does matter become perceptible, i. e., present itself as a body and an object of experience. Pure matter, on the other hand, which, as I have shown in the Criticism of the Kantian Philosophy, alone constitutes the true and admissible content of the conception of substance, is causality itself, thought objectively, consequently as in space, and therefore filling it. Accordingly the whole being of matter consists in acting. Only thus does it occupy space and last in time. It is through and through pure causality. Therefore wherever there is action there is matter, and the material is the active in general. But causality itself is the form of our understanding; for it is known to us a priori, as well as time and space. Thus matter also, so far and up to this point, belongs to the formal part of our knowledge, and is consequently that form of the understanding, causality itself, bound up with space and time, hence objectified, i. e., conceived as that which fills space. (The fuller explanation of this doctrine will be found in the second edition of the essay on the principle of sufficient reason, p. 77; third edition, p. 82.) So far, however, matter is properly not the object but the condition of experience; like the pure understanding itself, whose function it so far is. Therefore of pure matter there is also only a conception, no perception. It enters into all external experience as a necessary constituent part of it; yet it cannot be given in any experience, but is only thought, and thought indeed as that which is absolutely inert, inactive, formless, and without qualities, and which is yet the supporter of all forms, qualities, and effects. Accordingly, of all fleeting phenomena, thus of all manifestations of natural forces and all living beings, matter is the permanent substratum which is necessarily produced by the forms of our intellect in which the world as idea exhibits itself. As such, and as having sprung from the forms of the intellect, it is entirely indifferent to those phenomena themselves, i. e., it is just as ready to be the supporter of this force of nature as of that, whenever, under the guidance of causality, the necessary conditions appear; while it itself, just because its existence is really only formal, i. e., is founded in the intellect must be thought as that which under all that change is absolutely permanent, thus with regard to time is without beginning and without end. This is why we cannot give up the thought that anything may be made out of anything, for example, gold out of lead; for this would only require that we should find out and bring about the intermediate states which matter, in itself indifferent, would have to pass through upon that path. For a priori we can never see why the same matter which is now the supporter of the quality lead could not some time become the supporter of the quality gold. Matter, as that which is only thought a priori, is distinguished from the a priori intuitions or perceptions proper by the fact that we can also think it entirely away; space and time, on the contrary, never. But this only shows that we can present to ourselves space and time in imagination without matter. For the matter which has once been placed in them, and accordingly thought as existing, we can never again absolutely think away, i. e., imagine it as vanished and annihilated, but are always forced to think of it merely as transferred to another space. So far, then, matter is as inseparably connected with our faculty of knowledge as space and time themselves. Yet even the difference that it must first be voluntarily thought as existing indicates that it does not belong so entirely and in every regard to the formal part of our knowledge as space and time, but also contains an element which is only given a posteriori. It is, in fact, the point of connection of the empirical part of our knowledge with the pure and a priori part, consequently the peculiar foundation-stone of the world of experience.
Only where all a priori assertions cease, therefore in the entirely empirical part of our knowledge of bodies, in their form, quality, and definite manner of acting, does that will reveal itself which we have already recognised and established as the true inner nature of things. But these forms and qualities always appear only as the properties and manifestations of that very matter the existence and nature of which depends upon the subjective forms of our intellect, i. e., they only become visible in it, and therefore by means of it. For that which always exhibits itself to us is only matter acting in some specially determined manner. Out of the inner properties of such matter, properties which cannot be further explained, proceeds every definite kind of effect of given bodies; and yet the matter itself is never perceived, but only these effects, and the definite properties which lie at their foundation, after separating which, matter, as that which then remains over, is necessarily added in thought by us; for, according to the exposition given above, it is objectified causality itself. Accordingly matter is that whereby the will, which constitutes the inner nature of things, becomes capable of being apprehended, perceptible, visible. In this sense, then, matter is simply the visibility of the will, or the bond between the world as will and the world as idea. It belongs to the latter inasmuch as it is the product of the functions of the intellect, to the former inasmuch as that which manifests itself in all material existences, i. e., phenomena is the will. Therefore every object is, as thing in itself, will, and as phenomenon, matter. If we could strip any given matter of all the properties that come to it a priori, i. e., of all the forms of our perception and apprehension, we would have left the thing in itself, that which, by means of those forms, appears as the purely empirical in matter, but which would then itself no longer appear as something extended and active; i. e., we would no longer have matter before us, but the will. This very thing in itself, or the will, in that it becomes a phenomenon, i. e., enters the forms of our intellect, appears as matter, i. e., as the invisible but necessarily assumed supporter of the properties which are only visible through it. In this sense, then, matter is the visibility of the will. Consequently Plotinus and Giordano Bruno were right, not only in their sense but also in ours, when they made the paradoxical assertion already referred to in chapter 4: Matter itself is not extended, consequently it is incorporeal. For space, which is our form of perception, imparts extension to matter, and corporeal existence consists in acting, which depends upon causality, and consequently upon the form of our understanding. On the other hand, every definite property, thus everything empirical in matter, even gravity, depends upon that which only becomes visible by means of matter, the thing in itself, the will. Gravity is yet the lowest of all grades of the objectification of the will; therefore it appears in all matter without exception, thus is inseparable from matter in general. Yet, just because it is a manifestation of the will, it belongs to knowledge a posteriori, not to knowledge a priori. Therefore we can always picture to ourselves matter without weight, but not without extension, repulsive force, and stability, for then it would be without impenetrability, and consequently would not occupy space, i. e., it would be without the power of acting; but the nature of matter as such just consists in acting, i. e., in causality in general; and causality depends upon the a priori form of our understanding, and therefore cannot be thought away.