ALL THINGS LITURGICAL #1 The Structure of the Catholic Mass or Eucharist

The Structure of the Catholic Mass or Eucharist

The Eucharistic celebration is "one single act of worship" but consists of different elements, which always include "the proclamation of the Word of God; thanksgiving to God the Father for all his benefits, above all the gift of his Son; the consecration of bread and wine, which signifies also our own transformation into the body of Christ; and participation in the liturgical banquet by receiving the Lord's body and blood".
Within the fixed structure of the Roman-Rite Mass outlined below, the "proper" or daily-varying parts are the Scripture readings and responsorial psalm, the antiphons at the entrance and communion processions, and the texts of the three prayers known as the collect, the prayer over the gifts, and the post-communion prayer. These convey themes from the liturgical season, the feast days of titles or events in the life of Christ, the feast days and commemorations of the saints, or for Masses for particular circumstances (e.g., funeral Masses, Masses for the celebration of Confirmation, Masses for peace, to begin the academic year, etc.).

The easiest way to determine the type of form the Mass will take is the positioning of the priest and the language. The Tridentine form is almost universally, though not obligatorily, celebrated with the priest facing towards the altar away from the people and must be in Latin, while in the post-Vatican II form the priest generally faces the congregation and uses the language of the people taking part.

Introit, Procession, and Introductory Rites
The priest enters in procession into the nave with altar servers, and with a deacon if there is one. The deacon may carry the Evangelion (Gospel book), which he will place on the altar; and one altar server, called the crucifer, carries a processional cross at the front of the procession. Other servers may carry blessed candles, incense and a thurible. During this procession, ordinarily, the entrance chant or hymn is sung. If there is no singing at the entrance, the entrance antiphon is recited either by some or all of the faithful or by a lector; otherwise it is said by the priest himself. When the procession arrives at the sanctuary, all bow toward the altar. The priest and other ordained ministers kiss the altar. Then, when the priest arrives at his chair, he leads the assembly in making the Sign of the Cross, saying: "In the name of the Father, and of the Son, and of the Holy Spirit," to which the faithful answer: "Amen." Then the priest "signifies the presence of the Lord to the community gathered there by means of the Greeting. By this Greeting and the response of the faithful, the mystery of the Church gathered together is made manifest." The greetings are derived from the Pauline epistles.

Then the priest invites those present to take part in the Penitential Act, of which the Missal proposes three forms, the first of which is the Confiteor. One form includes tropes acclaiming God's deeds on our behalf, and the priest has some freedom in formulating these. This is concluded with the priest's prayer of absolution, "which, however, lacks the efficacy of the Sacrament of Penance." It does absolve venial sins, however. "From time to time on Sundays, especially in Easter Time, instead of the customary Penitential Act, the blessing and sprinkling of water may take place as a reminder of Baptism." This ceremony, in which the congregation is cleansed with holy water, is known as the Asperges.

"After the Penitential Act, the Kyrie, Eleison (Lord, have mercy) is always begun, unless it has already been part of the Penitential Act. Since it is a chant by which the faithful acclaim the Lord and implore his mercy, it is usually executed by everyone, that is to say, with the faithful and the choir or cantor taking part in it." The Kyrie may be sung or recited in the vernacular language or in the original Greek. It is the only portion of the Mass in Greek instead of Latin or Latinised Hebrew.

"The Gloria in Excelsis (Glory to God in the highest) is a most ancient and venerable hymn by which the Church, gathered in the Holy Spirit, glorifies and entreats God the Father and the Lamb. ...It is sung or said on Sundays outside Advent and Lent, and also on Solemnities and Feasts, and at particular celebrations of a more solemn character." The Gloria is omitted at requiem Masses (funerals and Masses for the dead) on ordinary feast-days of saints, weekdays, and Votive Masses. It is also optional, in line with the perceived degree of solemnity of the occasion, at Ritual Masses such as those celebrated for Marriage ("Nuptial Mass"), Confirmation or Religious Profession, at Masses on the Anniversary of Marriage or Religious Profession, and at Masses for Various Needs and Occasions.

"Next the Priest calls upon the people to pray and everybody, together with the Priest, observes a brief silence so that they may become aware of being in God’s presence and may call to mind their intentions. Then the Priest pronounces the prayer usually called the “Collect” and through which the character of the celebration finds expression."

Liturgy of the Word
On Sundays and solemnities, three Scripture readings are given. On other days there are only two. If there are three readings, the first is from the Old Testament (a term wider than Hebrew Scriptures, since it includes the Deuterocanonical Books), or the Acts of the Apostles during Eastertide. The first reading is followed by a Responsorial Psalm, a complete Psalm or a sizeable portion of one. A cantor, choir or lector leads, and the congregation sings or recites a refrain. "That the people may be able to sing the Psalm response more readily, texts of some responses and Psalms have been chosen for the various seasons of the year or for the various categories of Saints. These may be used in place of the text corresponding to the reading whenever the Psalm is sung." The second reading is from the New Testament, typically from one of the Pauline epistles. The reader begins most reading with the introductory statement "a reading from the Book of..." or "a reading from the Letter to...," and concludes each reading by proclaiming that the reading is "the word of the Lord,"; the congregation responds by saying "Thanks be to God." The lector will usually be a scheduled volunteer from among the congregation; when two non-Gospel readings are given, they may be given by two different lectors or by one, according to local preference.

The final reading and high point of the Liturgy of the Word is the proclamation of the Gospel. This is preceded by the singing of the Gospel Acclamation, typically an Alleluia with a verse of Scripture, which may be omitted if not sung. Alleluia is replaced during Lent by a different acclamation of praise. All stand while the Gospel is chanted or read by a deacon or, if none is available, by a priest. The reading is traditionally introduced with the phrase "a reading from the Holy Gospel according to" followed by the evangelist's name. To conclude the Gospel reading, the priest or deacon proclaims: "The Gospel of the Lord" and the faithful respond, "Praise to you, Lord Jesus Christ." The priest or deacon then kisses the book. If a deacon participates, he reads the Gospel. If a deacon is not present, the celebrating priest or a concelebrant, if there is one, proclaims it.

At least on Sundays and Holy Days of Obligation, a homily, a sermon that draws upon some aspect of the readings or of the liturgy, is then given. Ordinarily the priest celebrant himself gives the homily, but he may entrust it to a concelebrating priest or to the deacon, but never to a lay person. In particular cases and for a just cause, a bishop or priest who is present but cannot concelebrate may give the homily. On days other than Sundays and Holy Days of Obligation, the homily, though not obligatory, is recommended.

On Sundays and solemnities, all then profess their Christian faith by reciting or singing the Nicene Creed or, especially from Easter to Pentecost, the Apostles' Creed, which is particularly associated with baptism and is often used in Masses for children.

The Liturgy of the Word concludes with the Universal Prayer or Prayer of the Faithful. The priest begins it with a brief introduction, then a deacon, a cantor, or another lay person announces some intentions for prayer, to which the congregation responds with a short invocation such as "Lord hear our prayer." The priest concludes with a longer prayer.

Liturgy of the Eucharist

The linen corporal is spread over the center of the altar, and the Liturgy of the Eucharist begins with the ceremonial placing on it of bread and wine. These may be brought to the altar in a procession, especially if Mass is celebrated with a large congregation.The unleavened, wheat bread (in the tradition of the Latin Church) is placed on a paten, and the wine (from grapes) is put in a chalice and mixed with a little water, As the priest places each on the corporal, he says a silent prayer over each individually, which, if this rite is unaccompanied by singing, he is permitted to say aloud, in which case the congregation responds to each prayer with: "Blessed be God forever." Then the priest washes his hands, "a rite in which the desire for interior purification finds expression."

The congregation, which has been seated during this preparatory rite, rises, and the priest gives an exhortation to pray: "Pray, brethren, that my sacrifice and yours may be acceptable to God, the almighty Father." The congregation responds: "May the Lord accept the sacrifice at your hands, for the praise and glory of his name, for our good, and the good of all his holy Church." The priest then pronounces the variable prayer over the gifts.

The Eucharistic Prayer, "the centre and high point of the entire celebration", then begins with a dialogue between the priest and the faithful. This dialogue opens with the normal liturgical greeting, "The Lord be with you", but in view of the special solemnity of the rite now beginning, the priest then exhorts the faithful: "Lift up your hearts." The faithful respond with: "We lift them up to the Lord." The priest then introduces the great theme of "Eucharist", a word originating in the Greek word for giving thanks: "Let us give thanks to the Lord, our God." The faithful join in this sentiment, saying: "It is right and just."

The priest continues with one of many thematic Eucharistic Prayer prefaces, which lead to the Sanctus acclamation: "Holy, Holy, Holy Lord God of hosts. Heaven and earth are full of your glory. Hosanna in the highest. Blessed is he who comes in the name of the Lord. Hosanna in the highest."

In some countries, including the United States, the faithful kneel immediately after the singing or recitation of the Sanctus. If a person is unable to kneel, he makes a profound bow after the Consecration – the Institution Narrative that recalls Jesus' words and actions at his Last Supper: "Take this, all of you, and eat of it: for this is my body which will be given up for you. ...Take this, all of you, and drink from it: for this is the chalice of my blood, the blood of the new and eternal covenant, which will be poured out for you and for many for the forgiveness of sins. Do this in memory of me." In many places, a consecrated bell is rung after the elevation of each element. The tradition of raising the host and chalice high after the Consecration has its origin in the pre-Vatican 11 celebration of the Mass, and is done so that the people may more readily see the Host. It is also customary on solemnities and other days for the altar servers to offer incense to the Host and chalice during the elevation. The priest then announces: "The mystery of faith," and the faithful respond with an acclamation, using one of three prescribed formulae.

The chalice is displayed to the faithful immediately after the consecration of the wine.
The Eucharistic Prayer includes the Epiclesis (which since early Christian times the Eastern churches have seen as the climax of the Consecration), praying that the Holy Spirit might transform the elements of bread and wine and thereby the people into one body in Christ. The whole portion of the Antiphon recalling Christ's passion, death, and resurrection, is called the Anamnesis.

Intercessions for both the living and the souls in Purgatory follow. When there are priests concelebrating the Mass they join the main celebrant in the central prayers, up to the intercessions, which they may divide among themselves.

The Antiphon ends with an emphatic doxology for which the priest elevates the paten with the Host and the deacon (if there is one) elevates the chalice, and the priest(s) proclaim of Christ that "through him, with him, in him, in the unity of the Holy Spirit, all glory and honour is yours, Almighty Father, for ever and ever," to which the faithful sing or chant the great Amen. This Amen is the faithful's assent to all that God has wrought through the consecration and re-presention of the sacrifice of Christ.

Both the doxology and Great Amen are preferably sung or chanted. This is in line with the Instruction on Music in the Liturgy which says: "One cannot find anything more religious and more joyful in sacred celebrations than a whole congregation expressing its faith and devotion in song. Therefore the active participation of the whole people, which is shown in singing, is to be carefully promoted. ...It should, first of all, include acclamations, responses to the greetings of the priest and ministers and to the prayers of litany form, and also antiphons and psalms, refrains or repeated responses, hymns and canticles."

Communion rite
All together recite or sing the "Lord's Prayer" ("Pater Noster" or "Our Father"). The priest introduces it with a short phrase and follows it up with the embolism: "Deliver us, Lord, we pray, from every evil, graciously grant peace in our days, that, by the help of your mercy, we may be always free from sin and safe from all distress, as we await the blessed hope and the coming of our Savior, Jesus Christ." The faithful then add the doxology: "For the kingdom, the power, and the glory are yours, now and forever."

Next comes the rite of peace (pax). After praying: "Lord Jesus Christ, who said to your Apostles: Peace I leave you, my peace I give you; look not on our sins, but on the faith of your Church, and graciously grant her peace and unity in accordance with your will. Who live and reign for ever and ever," the priest wishes the faithful the peace of Christ: "The peace of the Lord be with you always." The deacon or, in his absence, the priest may then invite those present to offer each other the sign of peace. The form of the sign of peace varies according to local custom for a respectful greeting (for instance, a handshake or a bow between strangers, or a kiss/hug between family members).

The priest breaks the host and places a piece in the main chalice; this is known as the rite of fraction and commingling. Covering this action the "Lamb of God" ("Agnus Dei" in Latin) is sung or recited.

If extraordinary ministers of Holy Communion are required, they may come forward at this time, and approach the altar itself after the priest has received Communion. The priest then presents the Eucharistic Bread to the congregation, saying: "Behold the Lamb of God, behold him who takes away the sins of the world. Blessed are those who are called to the supper of the Lamb." Then all repeat: "Lord, I am not worthy that you should enter under my roof, but only say the word and my soul shall be healed,"[41] which is a reference in the Gospel of Matthew to where a Roman centurion manifests exemplary faith in Jesus to heal his servant, saying that Jesus' word alone was sufficient. The priest then receives Communion and, with the help of the deacon and concelebrants and, if necessary, extraordinary ministers of Holy Communion, distributes Communion to the faithful.

According to the Catholic Church doctrine receiving the Holy Communion in a state of mortal sin is a sacrilege and only those who are in a state of grace, that is, without any mortal sin, can receive it. Based on 1 Corinthians 11:27-29 it affirms the following: "Anyone who is aware of having committed a mortal sin must not receive Holy Communion, even if he experiences deep contrition, without having first received sacramental absolution unless he has a grave reason for receiving Communion and there is no possibility of going to confession."

"The faithful receive either kneeling or standing, as has been determined by the norms of the Conference of Bishops. However, when they receive the communion standing, it is recommended that before receiving the Sacrament they make an appropriate sign of reverence, to be determined by in the same norms." If received standing, the communicant bows profoundly before receiving.

Then the distributing minister says "The body of Christ" or "The blood of Christ",or "The body and blood of Christ" if both are distributed together. The communicant responds: "Amen." In most countries the communicant may receive the consecrated Host either on the tongue or in the hand, at the communicant's own discretion. If in the hand they should step aside and reverently consume the Host immediately.

While Communion is distributed, singing by all of an appropriate approved chant or hymn is recommended, to emphasize the essentially "communitarian" nature of the body of Christ. If there is no singing, a short antiphon may be recited by a lector. Otherwise, the priest himself recites it just before distributing Communion.

"The sacred vessels are purified by the priest, the deacon, or an instituted acolyte after Communion or after Mass, insofar as possible at the credence table." Then the priest concludes the Liturgy of the Eucharist with the Prayer after Communion, for which the faithful are invited to stand.

Concluding rite

After the Prayer after Communion, announcements may be made. The Missal says these should be brief. The priest then gives the usual liturgical greeting and imparts his blessing. The liturgy concludes with a dialogue between the priest and the assembly. The deacon, or in his absence, the priest himself then dismisses the faithful. The 2011 edition of the Missal adds new versions of the dismissal.

The faithful respond: "Thanks be to God." The priest and other ministers then venerate the altar with a kiss, form a procession, and exit the sanctuary, preferably to a recessional hymn or chant from the Graduale, sung by all.

The faithful then depart or stay to pray for a while, light votives at various shrines in the church, etc. In some countries, including the United States, the priest customarily stands outside the church door to greet the faithful individually as they exit.

https://en.wikipedia.org/wiki/Mass_in_the_Catholic_Church#Structure_of_Mass