10 The Magisterium's commitment to proclaiming the Eucharistic mystery has been matched by interior growth within the Christian community. 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. In many places, adoration of the Blessed Sacrament is also an important daily practice and becomes an inexhaustible source of holiness. The devout participation of the faithful in the Eucharistic procession on the Solemnity of the Body and Blood of Christ is a grace from the Lord which yearly brings joy to those who take part in it. Other positive signs of Eucharistic faith and love might also be mentioned. Unfortunately, alongside these lights, there are also shadows . In some places the practice of Eucharistic adoration has been almost completely abandoned. In various parts of the Church abuses have occurred, leading to confusion with regard to sound faith and Catholic doctrine concerning this wonderful sacrament. At times one encounters an extremely reductive understanding of the Eucharistic mystery. Stripped of its sacrificial meaning, it is celebrated as if it were simply a fraternal banquet. Furthermore, the necessity of the ministerial priesthood, grounded in apostolic succession, is at times obscured and the sacramental nature of the Eucharist is reduced to its mere effectiveness as a form of proclamation. This has led here and there to ecumenical initiatives which, albeit well-intentioned, indulge in Eucharistic practices contrary to the discipline by which the Church expresses her faith. How can we not express profound grief at all this? The Eucharist is too great a gift to tolerate ambiguity and depreciation. It is my hope that the present Encyclical Letter will effectively help to banish the dark clouds of unacceptable doctrine and practice, so that the Eucharist will continue to shine forth in all its radiant mystery.
Source: Ecclesia de Eucharistia (Vatican.va)