Whether the Council Fathers could foresee the impact of the reform of the liturgy on the life of the Church is impossible to know for certain. The liturgy is “the summit toward which the activity of the Church is directed; at the same time it is the fount from which all the Church’s power flows” (Sacrosanctum Concilium, 10). The Church’s effectiveness in teaching, evangelization, and charitable work finds its origin in the liturgy. Sacrosanctum Concilium goes on to explain that it is the liturgy that inspires, nourishes, and configures the faithful to go forth as witnesses in the world. The faithful depend on the liturgy for sustenance for their work in the world.. This is an important dimension of the Church’s relationship with the world explained more deeply in Gaudium et Spes. The Church brings to the world through her individual members an example and an instrument of healing and mercy, and those gifts are given to the faithful in part through the Sacred Liturgy.
The liturgy also expresses the nature of the Church with its structure, ministries, and parts. Through the encounter with Christ in the liturgy, the Church is built up to be what she is called to be. The nature of the Church is not only expressed – she also grows by her celebration of the sacraments. The liturgy, therefore, articulates and manifests what is expressed in Lumen Gentium.Richard B. Hilgartner, “Sacrosanctum Concilium Constitution on the Sacred Liturgy”, in A Liturgical Companion to the Documents of the Second Vatican Council, Danielle A. Noe, ed. (Chicago, IL: Liturgy Training Publications, 2016), p. 6. ISBN: 978-1-61671-314-0.