In the songs, the melodies, the choice of prayers and readings, the giving of the homily, the preparation of the prayer of the faithful, the occasional explanatory remarks, and the decoration of the Church building according to the various seasons, there is ample possibility for introducing into each celebration a certain variety by which the riches of the liturgical tradition will also be more clearly evident, and so, in keeping with pastoral requirements, the celebration will be carefully imbued with those particular features that will foster the recollection of the participants. Still, it should be remembered that the power of the liturgical celebrations does not consist in frequently altering the rites, but in probing more deeply the word of God and the mystery being celebrated.
[40.] Nevertheless, from the fact that the liturgical celebration obviously entails activity, it does not follow that everyone must necessarily have something concrete to do beyond the actions and gestures, as if a certain specific liturgical ministry must necessarily be given to the individuals to be carried out by them. Instead, catechetical instruction should strive diligently to correct those widespread superficial notions and practices often seen in recent years in this regard, and ever to instill anew in all of Christ’s faithful that sense of deep wonder before the greatness of the mystery of faith that is the Eucharist, in whose celebration the Church is forever passing from what is obsolete into newness of life: “in novitatem a vetustate”. For in the celebration of the Eucharist, as in the whole Christian life which draws its power from it and leads toward it, the Church, after the manner of Saint Thomas the Apostle, prostrates herself in adoration before the Lord who was crucified, suffered and died, was buried and arose, and perpetually exclaims to him who is clothed in the fullness of his divine splendour: “My Lord and my God!”
[41.] For encouraging, promoting and nourishing this interior understanding of liturgical participation, the continuous and widespread celebration of the Liturgy of the Hours, the use of the sacramentals and exercises of Christian popular piety are extremely helpful. These latter exercises – which “while not belonging to the Liturgy in the strict sense, possess nonetheless a particular importance and dignity” – are to be regarded as having a certain connection with the liturgical context, especially when they have been lauded and attested by the Magisterium itself, as is the case especially of the Marian Rosary. Furthermore, since these practices of piety lead the Christian people both to the reception of the sacraments – especially the Eucharist – and “to meditation on the mysteries of our Redemption and the imitation of the excellent heavenly examples of the Saints, they are therefore not without salutary effects for our participation in liturgical worship ”.
[42.] It must be acknowledged that the Church has not come together by human volition; rather, she has been called together by God in the Holy Spirit, and she responds through faith to his free calling (thus the word ekklesia is related to klesis, or “calling”). Nor is the Eucharistic Sacrifice to be considered a “concelebration”, in the univocal sense, of the Priest along with the people who are present. On the contrary, the Eucharist celebrated by the Priests “is a gift which radically transcends the power of the community. . . . The community that gathers for the celebration of the Eucharist absolutely requires an ordained Priest, who presides over it so that it may truly be a eucharistic convocation. On the other hand, the community is by itself incapable of providing an ordained minister”. There is pressing need of a concerted will to avoid all ambiguity in this matter and to remedy the difficulties of recent years. Accordingly, terms such as “celebrating community” or “celebrating assembly” (in other languages “asamblea celebrante”, “assemblée célébrante”, assemblea celebrante”) and similar terms should not be used injudiciously.