Chapter II. The Most Sacred Mystery of the Eucharist
47.At the Last Supper, on the night when He was betrayed, our Savior
instituted the eucharistic sacrifice of His Body and Blood. He did this in order to
perpetuate the sacrifice of the Cross throughout the centuries until He should come again,
and so to entrust to His beloved spouse, the Church, a memorial of His death and
resurrection; a sacrament of love, a sign of unity, a bond of charity,  a paschal banquet in which Christ
is eaten, the mind is filled with grace, and a pledge of future glory is given to us. 
48.The Church, therefore, earnestly desires that Christ's faithful, when present at
this mystery of faith, should not bee there as strangers or silent spectators; on the
contrary, through a good understanding of the rites and prayers they should take part in
the sacred action conscious of what they are doing, with devotion and full collaboration.
They should be instructed by God's word and be nourished at the table of the Lord's body;
they should give thanks to God; by offering the Immaculate Victim, not only through the
hands of the priest, but also with him, they should learn also to offer themselves;
through Christ the Mediator, 
they should be drawn day by day into ever more perfect union with God and with each other,
so that finally God may be all in all.
49.For this reason the sacred Council, having in mind those Masses which are celebrated
with the assistance of the faithful, especially on Sundays and feasts of obligation, has
made the following decrees in order that the sacrifice of the Mass, even in the ritual
forms of its celebration, may become pastorally efficacious to the fullest degree.
50.The rite of the Mass is to be revised in such a way that the intrinsic nature and
purpose of its several parts, as also the connection between them, may be more clearly
manifested, and that devout and active participation by the faithful may be more easily
For this purpose the rites are to be simplified, due care being taken to preserve their
substance; elements which, with the passage of time, came to be duplicated, or were added
with but little advantage, are now to be discarded; other elements which have suffered
injury through accidents of history are now to be restored to the vigor which they had in
the days of the holy Fathers, as may seem useful or necessary.
51.The treasures of the bible are to be opened up more lavishly, so that richer fare
may be provided for the faithful at the table of God's word. In this way a more
representative portion of the holy scriptures will be read to the people in the course of
a prescribed number of years.
52.By means of the homily the mysteries of the faith and the guiding principles of the
Christian life are expounded from the sacred text, during the course of the liturgical
year; the homily, therefore, is to be highly esteemed as part of the liturgy itself; in
fact, at those Masses which are celebrated with the assistance of the people on Sundays
and feasts of obligation, it should not be omitted except for a serious reason.
53.Especially on Sundays and feasts of obligation there is to be restored, after the
Gospel and the homily, "the common prayer" or "the prayer of the
faithful." By this prayer, in which the people are to take part, intercession will be
made for holy Church, for the civil authorities, for those oppressed by various needs, for
all mankind, and for the salvation of the entire world. 
54.In Masses which are celebrated with the people, a suitable place
may be allotted to their mother tongue. This is to apply in the first place to the
readings and "the common prayer," but also, as local conditions may warrant, to
those parts which pertain to the people, according to the norm laid down in Art. 36 of this Constitution.
Nevertheless steps should be taken so that the faithful may also be able to say or to
sing together in Latin those parts of the Ordinary of the Mass which pertain to them.
And whenever a more extended use of the mother tongue within the Mass appears
desirable, the regulation laid down in Art. 40 of this Constitution is to be observed.
55.That more perfect form of participation in the Mass whereby the
faithful, after the priest's communion, receive the Lord's body from the same sacrifice,
is strongly recommended.
The dogmatic principles which were laid down by the Council of Trent remaining intact,
 communion under both kinds may
be granted when the bishops think fit, not only to clerics and religious, but also to the
laity, in cases to be determined by the Apostolic See, as, for instance, to the newly
ordained in the Mass of their sacred ordination, to the newly professed in the Mass of
their religious profession, and to the newly baptized in the Mass which follows
56.The two parts which, in a certain sense, go to make up the Mass,
namely, the liturgy of the word and the eucharistic liturgy, are so closely connected with
each other that they form but one single act of worship. Accordingly this sacred Synod
strongly urges pastors of souls that, when instructing the faithful, they insistently
teach them to take their part in the entire Mass, especially on Sundays and feasts of
57. §1.Concelebration, whereby the unity of the priesthood is
appropriately manifested, has remained in use to this day in the Church both in the east
and in the west. For this reason it seemed good to the Council to extend permission for
concelebration to the following cases:
- a)on the Thursday of the Lord's Supper, not only at the Mass of the Chrism, but also at
the evening Mass.
b)at Masses during councils, bishop's conferences, and synods;
c)at the Mass for the blessing of an abbot.
- Also, with permission of the ordinary, to whom it belongs to decide whether
concelebration is opportune:
a)at conventual Mass, and at the principle Mass in churches when the needs of the faithful
do not require that all priests available should celebrate individually;
b)at Masses celebrated at any kind of priests' meetings, whether the priests be secular
clergy or religious.
- The regulation, however, of the discipline of concelebration in the diocese pertains to
- Nevertheless, each priest shall always retain his right to celebrate Mass individually,
though not at the same time in the same church as a concelebrated Mass, nor on Thursday of
the Lord's Supper.
58.A new rite for concelebration is to be drawn up and inserted into
the Pontifical and into the Roman Missal