The remaining ideal sense is hearing. This is in signal contrast to the one just described. Hearing is concerned with the tone, rather than the form and colour of an object, with the vibration of what is corporeal; it requires no process of dissolution, as the sense of smell requires, but merely a trembling of the object, by which the same is in no wise impoverished. This ideal motion, in which through its sound what is as it were the simple individuality[17], the soul of the material thing expresses itself, the ear receives also in an ideal way, just as the eye shape and colour, and suffers thereby what is ideal or not external in the object to appeal to what is spiritual or non-corporeal.
As a third accretion to these two senses we have the sensuous conception, memory, the retention of images, which appear in consciousness by means of the isolated perception, in this way subsumed under universals, and become related and united to the same by means of the imagination, so that now in one particular aspect the external reality itself exists both as ideal and spiritual, while that which is spiritual from another point of view accepts under the imaginative conception the form of what is external, and is brought to consciousness as a disparate and correlated aggregate.
This triple mode of seizing on reality offers art the well-known division into first, the plastic arts, which elaborate their content for vision in the external form and colour of objects, secondly, in the art of sound, music, and thirdly, into poetry, which as the art of speech uses tone merely as a symbol, in order, by means of it, to address itself directly to what is ideal in the contemplation, emotion, and imagination of our spiritual life. If we rest satisfied with this sensuous aspect of our subject-matter, as the final principle of its differentiation, we shall, in respect to our first principles, find ourselves in a difficulty, because the grounds of this division, instead of being deduced from the concrete notion of our subject-matter, are merely borrowed from the most abstract features of it. We have consequently to look about us once more for a principle of division that has deeper roots, which has, in fact, already been put forward in the introduction of this work as the truly systematic mode of dividing this third section of it. The function of art is just this and only this, namely, to bring before the grasp of the senses truth, as it is in the world of spirit, reconciled, that is, in its unity as a whole with objectivity and the sensuous material. In so far, then, as this is possible at this stage in the element of the external reality of the art-product to that extent the totality, which the Absolute is in its very truth, breaks apart into the various modes that differentiate it as a process.
The middle point, the truly substantive centrum, is given us here in the representation of the Absolute, God Himself as God, in His independent self-subsistence, not as yet developed to the point of motion and difference, or advanced to the active operation of and separation from what is His, but presented essentially self-absorbed in supreme divine repose and stillness, briefly the Ideal embodied in a form essentially adequate to itself, which persists in its determinate existence in correspondent identity with itself. And in order that it may appear in infinite self-subsistency the Absolute must be conceived as Spirit, as conscious Subject, but as Subject which possesses essentially itself its own adequate mode of external appearance.
As divine subject, however, which passes forth into actual reality, it has confronting it an external world for environment, which, in conformity with the Absolute, must be built up to an appearance harmonious with the same, an appearance permeated with the Absolute. This environing world is then on one side the objective as such, the basis, the embrace of external Nature, which, taken by itself, possesses no absolute significance for Spirit, nor any ideality such as is present to individual consciousness[18], and consequently is only able to express by suggestion the spiritual Ideal which its appearance must seek to secure by embodying its embraced content in a world of Beauty.
In opposition to external Nature we find the ideal realm of consciousness[19], the human soul as the medium[20] for the existence and manifestation of the Absolute. Together with this subjectivity is conjoined the multiplicity and differentiation of individuality, particularization, distinction, action, and development, that is, in general terms the full and varied world of the reality of Spirit[21], in which the Absolute is known, willed, experienced, and actively present. We may already infer from what we have indicated above that the differences under which the total content of art is differentiated are in essential consonance, both for our grasp and presentation of them, with what we have previously in the second portion of our inquiry examined as the symbolical, classical, and romantic types of art. In other words symbolic art only carries the art-process to the point of marking an affinity between content and form, instead of their identity, of only suggesting the ideal significance in itself and the content which that suggestion purports to express, in other words the external appearance[22]. It furnishes consequently the fundamental type to that specific art, whose function it is to elaborate the objective world as such, Nature's environment in the beautiful conclusion given by Art to Spirit (mind), and to image by suggestion the ideal significance of what is spiritual in this external medium. The classical Ideal, on the contrary, meets the case of the presentation of the Absolute as such, in its self-subsistent external reality, its essential self-repose, while the romantic Spirit (mind) type of art is, both in content and form, identical with the internal life of the soul, and the emotional life both in its infinite aspect and its finite particularity.
It is, then, on a principle such as the above that the system of the particular arts is differentiated as follows:
First, we have architecture, the beginning of all, whose foundation reposes in the very nature of its subject-matter. It is the commencement of art for this reason, that art at the start has in general terms neither discovered for the presentation of its spiritual content the adequate material, nor the forms that fully express it, and is consequently compelled to rest content in the mere search after such true satisfaction, and to do so in the externality of its content and its mode of presentation. The medium of this primary art is that which is essentially unspiritual, gross matter, that is, only capable of configuration according to physical laws of gravity. Its form is the image of external Nature, united by its regularity and symmetry in the whole of a work of art to express merely an external reflection of Spirit.
The second art is sculpture. Both for its principle and content it possesses spiritual individuality under the mode of the classic Ideal in the sense, namely, that the ideal and spiritual finds its expression in the corporeal appearance pertinent to spiritual life, which it is the function here of Art to present in existent artistic actuality. It consequently still accepts for its material gross matter in its spatial extension, without, however, shaping the same in conformity to rule merely in respect to its gravity and its natural conditions according to the forms of the organic or inorganic, or in relation to its visibility in bringing it down to, and in all essential respects particularizing it in, a simple repetition of the external appearance. The form which is here, however, determined by virtue of the content itself is the actual life of Spirit, human form, and its objective organism permeated with Spirit's own breath, whose function it is to embody in adequate shape the self-subsistence of the Divine in its supreme repose and unperturbed greatness, unaffected by the divisions and limitations of human affairs, their conflicts and endurances.
Thirdly, we have to render intelligible in one final whole those arts whose province it is to give form to the ideal content of the individual soul-life.