[3.] The norms contained in the present Instruction are to be understood as pertaining to liturgical matters in the Roman Rite, and, mutatis mutandis, in the other Rites of the Latin Church that are duly acknowledged by law.
[4.] “Certainly the liturgical reform inaugurated by the Council has greatly contributed to a more conscious, active and fruitful participation in the Holy Sacrifice of the Altar on the part of the faithful.” Even so, “shadows are not lacking”. In this regard it is not possible to be silent about the abuses, even quite grave ones, against the nature of the Liturgy and the Sacraments as well as the tradition and the authority of the Church, which in our day not infrequently plague liturgical celebrations in one ecclesial environment or another. In some places the perpetration of liturgical abuses has become almost habitual, a fact which obviously cannot be allowed and must cease.
[5.] The observance of the norms published by the authority of the Church requires conformity of thought and of word, of external action and of the application of the heart. A merely external observation of norms would obviously be contrary to the nature of the Sacred Liturgy, in which Christ himself wishes to gather his Church, so that together with himself she will be “one body and one spirit”. For this reason, external action must be illuminated by faith and charity, which unite us with Christ and with one another and engender love for the poor and the abandoned. The liturgical words and rites, moreover, are a faithful expression, matured over the centuries, of the understanding of Christ, and they teach us to think as he himself does; by conforming our minds to these words, we raise our hearts to the Lord. All that is said in this Instruction is directed toward such a conformity of our own understanding with that of Christ, as expressed in the words and the rites of the Liturgy.
[6.] For abuses “contribute to the obscuring of the Catholic faith and doctrine concerning this wonderful sacrament”. Thus, they also hinder the faithful from “re-living in a certain way the experience of the two disciples of Emmaus: ‘and their eyes were opened, and they recognized him’”. For in the presence of God’s power and divinity and the splendour of his goodness, made manifest especially in the Sacrament of the Eucharist, it is fitting that all the faithful should have and put into practice that power of acknowledging God’s majesty that they have received through the saving Passion of the Only-Begotten Son.
[7.] Not infrequently, abuses are rooted in a false understanding of liberty. Yet God has not granted us in Christ an illusory liberty by which we may do what we wish, but a liberty by which we may do that which is fitting and right. This is true not only of precepts coming directly from God, but also of laws promulgated by the Church, with appropriate regard for the nature of each norm. For this reason, all should conform to the ordinances set forth by legitimate ecclesiastical authority.
[8.] It is therefore to be noted with great sadness that “ecumenical initiatives which are well-intentioned, nevertheless indulge at times in Eucharistic practices contrary to the discipline by which the Church expresses her faith”. Yet the Eucharist “is too great a gift to tolerate ambiguity or depreciation”. It is therefore necessary that some things be corrected or more clearly delineated so that in this respect as well “the Eucharist will continue to shine forth in all its radiant mystery”.
[9.] Finally, abuses are often based on ignorance, in that they involve a rejection of those elements whose deeper meaning is not understood and whose antiquity is not recognized. For “the liturgical prayers, orations and songs are pervaded by the inspiration and impulse” of the Sacred Scriptures themselves, “and it is from these that the actions and signs receive their meaning”. As for the visible signs “which the Sacred Liturgy uses in order to signify the invisible divine realities, they have been chosen by Christ or by the Church”. Finally, the structures and forms of the sacred celebrations according to each of the Rites of both East and West are in harmony with the practice of the universal Church also as regards practices received universally from apostolic and unbroken tradition, which it is the Church’s task to transmit faithfully and carefully to future generations. All these things are wisely safeguarded and protected by the liturgical norms.