2. The sum of all that is purely objective in our knowledge we may call Nature; while the sum of all that is subjective may be designated the Ego, or Intelligence. These two concepts are mutually opposed. Intelligence is originally conceived as that which solely represents—Nature as that which is merely capable of representation; the former as the conscious—the latter as the unconscious. There is, moreover, necessary in all knowledge a mutual agreement of the two—the conscious and the unconscious per se. The problem is to explain this agreement.
3. In knowledge itself, in my knowing, objective and subjective are so united that it is impossible to say to which of the two the priority belongs. There is here no first and no second—the two are contemporaneous and one. In my efforts to explain this identity, I must first have it undone. In order to explain it, inasmuch as nothing else is given me as a principle of explanation beyond these two factors of knowledge, I must of necessity place the one before the other—set out from the one in order from it to arrive at the other. From which of the two I am to set out is not determined by the problem.
4. There are, therefore, only two cases possible:
A. Either the objective is made the first, and the question comes to be how a subjective agreeing with it is superinduced.
The idea of the subjective is not contained in the idea of the objective; they rather mutually exclude each other. The subjective, therefore, must be superinduced upon the objective. It forms no part of the conception of Nature that there should be something intelligent to represent it. Nature, to all appearance, would exist even were there nothing to represent it. The problem may therefore likewise be expressed thus: How is the Intelligent superinduced upon Nature? or, How comes Nature to be represented?
The problem assumes Nature, or the objective, as first. It is, therefore, manifestly, a problem of natural science, which does the same. That natural science really, and without knowing it, approximates, at least, to the solution of this problem can be shown here only briefly.
If all knowledge has, as it were, two poles, which mutually suppose and demand each other, they must reciprocally be objects of search in all sciences. There must, therefore, of necessity, be two fundamental sciences; and it must be impossible to set out from the one pole without being driven to the other. The necessary tendency of all natural science, therefore, is to pass from Nature to the intelligent. This, and this alone, lies at the bottom of the effort to bring theory into natural phenomena. The final perfection of natural science would be the complete mentalization of all the laws of Nature into laws of thought. The phenomena, that is, the material, must vanish entirely, and leave only the laws—that is, the formal. Hence it is that the more the accordance with law is manifested in Nature itself, the more the wrappage disappears—the phenomena themselves become more mental, and at last entirely cease. Optical phenomena are nothing more than a geometry whose lines are drawn through the light; and even this light itself is of doubtful materiality. In the phenomena of magnetism all trace of matter has already disappeared, and of those of gravitation; which even physical philosophers believed could be attributed only to direct spiritual influence, there remains nothing but the law, whose action on a large scale is the mechanism of the heavenly motions. The complete theory of Nature would be that whereby the whole of Nature should be resolved into an intelligence. The dead and unconscious products of Nature are only unsuccessful attempts of Nature to reflect itself, and dead Nature, so-called, is merely an unripe Intelligence; hence in its phenomena the intelligent character peers through, though yet unconsciously. Its highest aim, namely, that of becoming completely self-objective, Nature reaches only in its highest and last reflection, which is nothing else than man, or, more generally, what we call reason, by means of which Nature turns completely back upon itself, and by which is manifested that Nature is originally identical with what in us is known as intelligent and conscious.
This may perhaps suffice to prove that natural science has a necessary tendency to render Nature intelligent. By this very tendency it is that it becomes natural philosophy, which is one of the two necessary fundamental sciences of philosophy.
B. Or the subjective is made the first, and the problem is, how an objective is superinduced agreeing with it.
If all knowledge is based upon the agreement of these two, then the task of explaining this agreement is plainly the highest for all knowledge; and if, as is generally admitted, philosophy is the highest and loftiest of all sciences, it is certainly the main task of philosophy.