According to all this, we may regard the phenomenal world, or nature, and music as two different expressions of the same thing, which is therefore itself the only medium of their analogy, so that a knowledge of it is demanded in order to understand that analogy. Music, therefore, if regarded as an expression of the world, is in the highest degree a universal language, which is related indeed to the universality of concepts, much as they are related to the particular things. Its universality, however, is by no means that empty universality of abstraction, but quite of a different kind, and is united with thorough and distinct definiteness. In this respect it resembles geometrical figures and numbers, which are the universal forms of all possible objects of experience and applicable to them all _a priori_, and yet are not abstract but perceptible and thoroughly determined. All possible efforts, excitements, and manifestations of will, all that goes on in the heart of man and that reason includes in the wide, negative concept of feeling, may be expressed by the infinite number of possible melodies, but always in the universal, in the mere form, without the material, always according to the thing-in-itself, not the phenomenon, the inmost soul, as it were, of the phenomenon, without the body. This deep relation which music has to the true nature of all things also explains the fact that suitable music played to any scene, action, event, or surrounding seems to disclose to us its most secret meaning, and appears as the most accurate and distinct commentary upon it. This is so truly the case, that whoever gives himself up entirely to the impression of a symphony, seems to see all the possible events of life and the world take place in himself, yet if he reflects, he can find no likeness between the music and the things that passed before his mind. For, as we have said, music is distinguished from all the other arts by the fact that it is not a copy of the phenomenon, or, more accurately, the adequate objectivity of will, but is the direct copy of the will itself, and therefore exhibits itself as the metaphysical to everything physical in the world, and as the thing-in-itself to every phenomenon. We might, therefore, just as well call the world embodied music as embodied will; and this is the reason why music makes every picture, and indeed every scene of real life and of the world, at once appear with higher significance, certainly all the more in proportion as its melody is analogous to the inner spirit of the given phenomenon. It rests upon this that we are able to set a poem to music as a song, or a perceptible representation as a pantomime, or both as an opera. Such particular pictures of human life, set to the universal language of music, are never bound to it or correspond to it with stringent necessity; but they stand to it only in the relation of an example chosen at will to a general concept.