Once the central position of the liturgy in the plan of redemption is recognized and when it is distinguish from the protocol of its administration (the rubrics), then it is seen, not as an end in itself, but the function of communication for divine life so that we, who come from the Trinity, may live by the Trinity and go to the Trinity. All definitions of liturgy imply its divine source, the Mass.

The Liturgy is the official dispensation of the Mysteries of Christ. It is ‘the whole body of official prayers and sacramental actions whereby the communication of men with God is carried on in the Church', ‘the life-dispensing, life-preserving and life-restoring activity of Ecclesia, the mystical Christ'. It is the official distribution of Christ's life by which through the Church he communicates grace to individuals by means of the four inter-related parts: the sacraments, the sacramentals and ritual prayers, the Divine Office, and the Liturgical Year—all centred about an finding their source in the Holy Sacrifice of the Mass.