This is the point at which our mode of conception diverges from those of the currently so-called dynamical physics.
Our assertion, briefly stated, is this:—If the infinite evolution of nature were completed (which is impossible) it would separate up into original and simple actions, or, if we may so express ourselves, into simple productivities. Our assertion therefore is not: There are in nature such simple actions; but only, they are the ideal grounds of the explanation of quality. These entelechies cannot actually be shown, they do not exist; we have not therefore to explain here anything more than is asserted, namely, that such original productivities must be thought as the grounds of the explanation of all quality. This proof is as follows:
The affirmation that nothing which is in space, that is, that nothing at all is mechanically simple, requires no demonstration. That, therefore, which is in reality simple, cannot be thought as in space, but must be thought as outside of space. But outside of space only pure intensity is thought. This idea of pure intensity is expressed by the idea of action. It is not the product of this action that is simple, but the action itself abstracted from the product, and it must be simple in order that the product may be divisible ad infinitum. For although the parts are near vanishing, the intensity must still remain. And this pure intensity is what, even in infinite divisibility, sustains the substrate.
If, therefore, the assertion that affirms something simple as the basis of the explanation of quality is atomistic, then our philosophy is atomistic. But, inasmuch as it places the simple in something that is only productive without being a product, it is dynamical atomistics.
This much is clear, that if we admit an absolute division of nature into its factors, the last (thing) that remains over, must be something, which absolutely defies all division, that is, the simple. But the simple can be thought only as dynamical, and as such it is not in space at all (it designates only what is thought as altogether outside of space-occupation); there is therefore no intuition of it possible, except through its product. In like manner there is no measure for it given but its product. For to pure thought it is the mere origin of the product (as the point is only the origin of the line), in one word pure entelechy. But that which is known, not in itself, but only in its product, is known altogether empirically. If, therefore, every original quality, as quality (not as substrate, in which quality merely inheres), must be thought as pure intensity, pure action, then qualities generally are only the absolutely empirical in our knowledge of nature, of which no construction is possible, and in respect to which there remains nothing of the philosophy of nature, save the proof that they are the absolute limit of its construction.
The question in reference to the ground of quality posits the evolution of nature as completed, that is, it posits something merely thought, and therefore can be answered only by an ideal ground of explanation. This question adopts the stand-point of reflection (on the product), whereas genuine dynamics always remain on the stand-point of intuition.
It must here, however, be at once remarked that if the ground of the explanation of quality is conceived as an ideal one, the question only regards the explanations of quality, in so far as it is thought as absolute. There is no question, for instance, of quality, in so far as it shows itself in the dynamical process. For quality, so far as it is relative, there is certainly a [not merely ideal, but actually real] ground of explanation and determination; quality in that case is determined by its opposite, with which it is placed in conflict, and this antithesis is itself again determined by a higher antithesis, and so on back into infinity; so that, if this universal organization could dissolve itself, all matter likewise would sink back into dynamical inactivity, that is, into absolute defect of quality. (Quality is a higher power of matter, to which the latter elevates itself by reciprocity.) It is demonstrated in the sequel that the dynamical process is a limited one for each individual sphere; because it is only thereby that definite points of relation for the determination of quality arise. This limitation of the dynamical process, that is, the proper determination of quality, takes place by means of no force other than that by which the evolution is universally and absolutely limited, and this negative element is the only one in things that is indivisible, and mastered by nothing.—The absolute relativity of all quality may be shown from the electric relation of bodies, inasmuch as the same body that is positive with one is negative with another, and conversely. But we might now henceforth abide by the statement (which is also laid down in the Outlines): All quality is electricity, and conversely, the electricity of a body is also its quality, (for all difference of quality is equal to difference of electricity, and all [chemical] quality is reducible to electricity).—Everything that is sensible for us (sensible in the narrower acceptation of the term, as colors, taste, &c.), is doubtless sensible to us only through electricity, and the only immediately sensible (element) would then be electricity,[[21]] a conclusion to which the universal duality of every sense leads us independently, inasmuch as in Nature there is properly only one duality. In galvanism, sensibility, as a reagent, reduces all quality of bodies, for which it is a reagent to an original difference. All bodies which, in a chain, at all affect the sense of taste or that of sight, be their differences ever so great, are either alkaline or acid, excite a negative or positive shock, and here they always appear as active in a higher than the merely chemical power.
Quality considered as absolute is inconstructible, because quality generally is not anything absolute, and there is no other quality at all, save that which bodies show mutually in relation to each other, and all quantity is something in virtue of which the body is, so to speak, raised above itself.
All hitherto attempted construction of quality reduces itself to the two attempts; to express qualities by figures, and so, for each original quality, to assume a particular figure in Nature; or else, to express quality by analytical formulæ (in which the forces of attraction and repulsion supply the negative and positive magnitudes.) To convince oneself of the futility of this attempt, the shortest method is to appeal to the emptiness of the explanations to which it gives rise. Hence we limit ourselves here to the single remark, that through the construction of all matter out of the two fundamental forces, different degrees of density may indeed be constructed, but certainly never different qualities as qualities; for although all dynamical (qualitative) changes appear, in their lowest stage, as changes of the fundamental forces, yet we see at that stage only the product of the process—not the process itself—and those changes are what require explanation, and the ground of explanation must therefore certainly be sought in something higher.
The only possible ground of explanation for quality is an ideal one; because this ground itself presupposes something purely ideal. If any one inquire into the final ground of quality, he transports himself back to the starting point of Nature. But where is this starting point? and does not all quality consist in this, that matter is prevented by the general concatenation from reverting into its originality?