The unison chant, although confined in the vast majority of congregations to the portions of the liturgy that are sung by the priest, is still the one officially recognized form of liturgic music. Although in the historic development of musical art representatives of the later phases of music have been admitted into the Church, they exist there only, we might say, by sufferance,—the chant still remains the legal basis of the whole scheme of worship music. The chant melodies are no mere musical accompaniment; they are the very life breath of the words. The text is so exalted in diction and import, partaking of the sanctity of the sacrificial function to which it ministers, that it must be uttered in tones especially consecrated to it. So intimate is this reciprocal relation of tone and language that in process of time these two elements have become amalgamated into a union so complete that no dissolution is possible even in thought. There is no question that the chant melodies as they exist to-day are only modifications, in most cases but slight modifications, of those that were originally associated with the several portions of the liturgy. At the moment when any form of words was given a place in the Missal or Breviary, its proper melody was then and there wedded to it. This fact makes the Catholic liturgic chant a distinctive church song in a special and peculiar sense. It is not, like most other church music, the artistic creation of individuals, enriching the service with contributions from without, and imparting to them a quality drawn from the composer’s personal feeling and artistic methods. It is rather a sort of religious folk-song, proceeding from the inner shrine of religion. It is abstract, impersonal; its style is strictly ecclesiastical, both in its inherent solemnity and its ancient association, and it bears, like the ritual itself, the sanction of unimpeachable authority. The reverence paid by the Church to the liturgic chant as a peculiarly sacred form of utterance is plainly indicated by the fact that while there is no restraint upon the license of choice on the part of the choir, no other form of song has ever been heard, or can ever be permitted to be heard, from the priest in the performance of his ministrations at the altar.