“The liturgy is the summit toward which the activity of the Church is directed; it is also the fount from which all her power flows” (Sacrosanctum concilium, 10). “For it is the liturgy through which, especially in the divine sacrifice of the Eucharist, the work of our redemption is accomplished, and it is through the liturgy, especially, that the faithful are enabled to express in their lives and manifest to others the mystery of Christ and the real nature of the Church” (Sacrosanctum concilium, 2).