Institutio generalis Missalis Romani

The Eucharistic celebration is an action of Christ and the Church, namely, the holy people united and ordered under the Bishop. It therefore pertains to the whole Body of the Church, manifests it, and has its effect upon it. It also affects the individual members of the Church in different ways, according to their different orders, offices, and actual participation.^{75Cf. Second Vatican Ecumenical Council, Constitution on the Sacred Liturgy, Sacrosanctum Concilium, no. 26.} In this way, the Christian people, “a chosen race, a royal priesthood, a holy nation, God’s own people,” expresses its cohesion and its hierarchical ordering.^{76Cf. Second Vatican Ecumenical Council, Constitution on the Sacred Liturgy, Sacrosanctum Concilium, no. 14.} All, therefore, whether they are ordained ministers or lay Christian faithful, in fulfilling their office or their duty, should carry out solely but completely that which pertains to them.^{77Cf. Second Vatican Ecumenical Council, Constitution on the Sacred Liturgy, Sacrosanctum Concilium, no. 28.}