Without a doubt, the voice is an integral part of the Divine Liturgy. Whether it be a response, a prayer, or singing, the voice is a part of the Mass. The human voice becomes, especially in the Holy Mass, an instrument through the ministry of the Mystical Body to participate in that beautiful and sacred “exchange of man’s (really Christ’s) homage and Gods life” . It only seems necessary, then, that the voice partakes in the Mass in the most proper way–the most beautiful and majestic way fit for honoring the King of kings. We can come to know what is best through the Spirit that works through the Church. It is this post’s purpose, thence, to present that the most authentic praise and song fit for the Divine Liturgy is founded in the form of Gregorian Chant–as has been taught and continues to be affirmed by Mother Church.
Pope Pius X writes, in his Motu Propio Tra Le Sollecitudini promulgated in 1903, that
[Gregorian Chant is] the Chant proper to the Roman Church, the only chant she has inherited from the ancient fathers, which she has jealously guarded for centuries in her liturgical codices, which she directly proposes to the faithful as her own, which she prescribes exclusively for some parts of the liturgy, and which the most recent studies have so happily restored to their integrity and purity.