51. The development of sacred art and liturgical discipline which took place in lands of ancient Christian heritage is also taking place on continents where Christianity is younger. This was precisely the approach supported by the Second Vatican Council on the need for sound and proper “inculturation”. In my numerous Pastoral Visits I have seen, throughout the world, the great vitality which the celebration of the Eucharist can have when marked by the forms, styles and sensibilities of different cultures. By adaptation to the changing conditions of time and place, the Eucharist offers sustenance not only to individuals but to entire peoples, and it shapes cultures inspired by Christianity.
It is necessary, however, that this important work of adaptation be carried out with a constant awareness of the ineffable mystery against which every generation is called to measure itself. The “treasure” is too important and precious to risk impoverishment or compromise through forms of experimentation or practices introduced without a careful review on the part of the competent ecclesiastical authorities. Furthermore, the centrality of the Eucharistic mystery demands that any such review must be undertaken in close association with the Holy See. As I wrote in my Post-Synodal Apostolic Exhortation Ecclesia in Asia, “such cooperation is essential because the Sacred Liturgy expresses and celebrates the one faith professed by all and, being the heritage of the whole Church, cannot be determined by local Churches in isolation from the universal Church”.101