Essential correlation is the specific and completely universal phase in which things appear. Everything that exists stands in correlation, and this correlation is the veritable nature of every existence. The existent thing in this way has no being of its own, but only in something else: in this other however it is self-relation; and correlation is the unity of the self-relation and relation-to-others.

The relation of the whole and the parts is untrue to this extent, that the notion and the reality of the relation are not in harmony. The notion of the whole is to contain parts: but if the whole is taken and made what its notion implies, i.e. if it is divided, it at once ceases to be a whole. Things there are, no doubt, which correspond to this relation: but for that very reason they are low and untrue existences. We must remember however what 'untrue' signifies. When it occurs in a philosophical discussion, the term 'untrue' does not signify that the thing to which it is applied is non-existent. A bad state or a sickly body may exist all the same; but these things are untrue, because their notion and their reality are out of harmony.

The relation of whole and parts, being the immediate relation, comes easy to reflective understanding; and for that reason it often satisfies when the question really turns on profounder ties. The limbs and organs, for instance, of an organic body are not merely parts of it: it is only in their unity that they are what they are, and they are unquestionably affected by that unity, as they also in turn affect it. These limbs and organs become mere parts, only when they pass under the hands of the anatomist, whose occupation, be it remembered, is not with the living body but with the corpse. Not that such analysis is illegitimate: we only mean that the external and mechanical relation of whole and parts is not sufficient for us, if we want to study organic life in its truth. And if this be so in organic life, it is the case to a much greater extent when we apply this relation to the mind and the formations of the spiritual world. Psychologists may not expressly speak of parts of the soul or mind, but the mode in which this subject is treated by the analytic understanding is largely founded on the analogy of this finite relation. At least that is so, when the different forms of mental activity are enumerated and described merely in their isolation one after another, as so-called special powers and faculties.

136.] (β) The one-and-same of this correlation (the self-relation found in it) is thus immediately a negative self-relation. The correlation is in short the mediating process whereby one and the same is first unaffected towards difference, and secondly is the negative self-relation, which repels itself as reflection-into-self to difference, and invests itself (as reflection-into-something-else) with existence, whilst it conversely leads back this reflection-into-other to self-relation and indifference. This gives the correlation of Force and its Expression.

The relationship of whole and part is the immediate and therefore unintelligent (mechanical) relation,—a revulsion of self-identity into mere variety. Thus we pass from the whole to the parts, and from the parts to the whole: in the one we forget its opposition to the other, while each on its own account, at one time the whole, at another the parts, is taken to be an independent existence. In other words, when the parts are declared to subsist in the whole, and the whole to consist of the parts, we have either member of the relation at different times taken to be permanently subsistent, while the other is non-essential. In its superficial form the mechanical nexus consists in the parts being independent of each other and of the whole.

This relation may be adopted for the progression ad infinitum, in the case of the divisibility of matter: and then it becomes an unintelligent alternation with the two sides. A thing at one time is taken as a whole: then we go on to specify the parts: this specifying is forgotten, and what was a part is regarded as a whole: then the specifying of the part comes up again, and so on for ever. But if this infinity be taken as the negative which it is, it is the negative self-relating element in the correlation,—Force, the self-identical whole, or immanency; which yet supersedes this immanency and gives itself expression;—and conversely the expression which vanishes and returns into Force.

Force, notwithstanding this infinity, is also finite: for the content, or the one and the same of the Force and its out-putting, is this identity at first only for the observer: the two sides of the relation are not yet, each on its own account, the concrete identity of that one and same, not yet the totality. For one another they are therefore different, and the relationship is a finite one. Force consequently requires solicitation from without: it works blindly: and on account of this defectiveness of form, the content is also limited and accidental. It is not yet genuinely identical with the form: not yet is it as a notion and an end; that is to say, it is not intrinsically and actually determinate. This difference is most vital, but not easy to apprehend: it will assume a clearer formulation when we reach Design. If it be overlooked, it leads to the confusion of conceiving God as Force, a confusion from which Herder's God especially suffers.

It is often said that the nature of Force itself is unknown and only its manifestation apprehended. But, in the first place, it may be replied, every article in the import of Force is the same as what is specified in the Exertion: and the explanation of a phenomenon by a Force is to that extent a mere tautology. What is supposed to remain unknown, therefore, is really nothing but the empty form of reflection-into-self, by which alone the Force is distinguished from the Exertion,—and that form too is something familiar. It is a form that does not make the slightest addition to the content and to the law, which have to be discovered from the phenomenon alone. Another assurance always given is that to speak of forces implies no theory as to their nature: and that being so, it is impossible to see why the form of Force has been introduced into the sciences at all. In the second place the nature of Force is undoubtedly unknown: we are still without any necessity binding and connecting its content together in itself, as we are without necessity in the content, in so far as it is expressly limited and hence has its character by means of another thing outside it.

(1) Compared with the immediate relation of whole and parts, the relation between force and its putting-forth may be considered infinite. In it that identity of the two sides is realised, which in the former relation only existed for the observer. The whole, though we can see that it consists of parts, ceases to be a whole when it is divided: whereas force is only shown to be force when it exerts itself, and in its exercise only comes back to itself. The exercise is only force once more. Yet, on further examination even this relation will appear finite, and finite in virtue of this mediation: just as, conversely, the relation of whole and parts is obviously finite in virtue of its immediacy. The first and simplest evidence for the finitude of the mediated relation of force and its exercise is, that each and every force is conditioned and requires something else than itself for its subsistence. For instance, a special vehicle of magnetic force, as is well known, is iron, the other properties of which, such as its colour, specific weight, or relation to acids, are independent of this connexion with magnetism. The same thing is seen in all other forces, which from one end to the other are found to be conditioned and mediated by something else than themselves. Another proof of the finite nature of force is that it requires solicitation before it can put itself forth. That through which the force is solicited, is itself another exertion of force, which cannot put itself forth without similar solicitation. This brings us either to a repetition of the infinite progression, or to a reciprocity of soliciting and being solicited. In either case we have no absolute beginning of motion. Force is not as yet, like the final cause, inherently self-determining: the content is given to it as determined, and force, when it exerts itself, is, according to the phrase, blind in its working. That phrase implies the distinction between abstract force-manifestation and teleological action.