But if among the common people, the devout, and occasionally also among people of culture, this highest art is not divested of its mythical environment, which still persists, although in a more ideal form, yet it has followed and still follows the general evolution of human ideas. The art of music was identified with song and with the mythical personality ascribed to it, of which these instruments were the extrinsic and harmonious echo; at first, like the other arts, it, was a religious conception and entity pertaining to the Church, but it gradually assumed a character of its own, was dissociated from the Church, and became a secular art, diverging more and more from the mythical ideas with which it had before been filled. When instruments increased in number, and became more perfect in quality; when harmony, strictly so called, was developed and became more efficient, instrumental music still continued to be the servant of vocal music, and was employed to give emphasis, relief, warmth, and colour to the art of song, which continued to be supreme. Song had its peculiar musical character, and the human voice, alone or in a chorus, might be regarded as the type of instrumental music, rendered more effective by the words which expressed the ideas and sentiments of such songs by harmonizing the various vocal instruments in accordance with their tones and varying _timbre_. Instrumental music, by the melodious harmony of artificial sounds, had however a vast field peculiar to itself, and an existence independent of the human voice. This was and is, in addition to its release from the bonds of myth, the necessary result of the evolution of this highest art.