The celebration of Mass is an act of the whole assembly gathered for worship. In the Mass, the Church is joined to the action of Christ. We are joined to this divine action through Baptism, which incorporates us into the risen Christ. This action, which lies at “the center of the whole of Christian life” (General Instruction of the Roman Missal [GIRM], no. 16), is initiated not by us but by God acting in and through the Church as the Body of the risen Christ. The Liturgy is designed to bring about in all those who make up the worshiping assembly a “participation of the faithful, namely in body and in mind, a participation fervent with faith, hope, and charity” (GIRM, no. 18). To the extent that we are able to participate in this way, the work of redemption becomes personally effective for each of us. By such participation we make the actions and prayers of the Liturgy our own; we enter more fully into our personal communion with Christ’s redeeming act and perfect worship.
“In the celebration of Mass the faithful form a holy people, a people of God’s own possession and a royal Priesthood, so that they may give thanks to God and offer the unblemished sacrificial Victim not only by means of the hands of the Priest but also together with him and so that they may learn to offer their very selves. They should, moreover, take care to show this by their deep religious sense and their charity toward brothers and sisters who participate with them in the same celebration. . . . Moreover, they are to form one body, whether in hearing the word of God, or in taking part in the prayers and in the singing or above all by the common offering of the Sacrifice and by participating together at the Lord’s table” (GIRM, nos. 95, 96). The participation of each person in the Liturgy is important. Each person needs to do his or her part.
Order of the Mass
- Entrance: The Mass begins with the entrance chant/song. The celebrant and other ministers enter in procession and reverence the altar with a bow and/or a kiss. The altar is a symbol of Christ at the heart of the assembly and so deserves this special reverence.
- Greeting: All make the Sign of the Cross and the celebrant extends a greeting to the gathered people in words taken from Scripture.
- Penitential Act: The Penitential Act follows the greeting. At the very beginning of the Mass, the faithful recall their sins and place their trust in God’s abiding mercy. The Penitential Act includes the Kyrie Eleison, a Greek phrase meaning, “Lord, have mercy.” This litany recalls God’s merciful actions throughout history. On Sundays, especially in Easter Time, in place of the customary Penitential Act, from time to time the blessing and sprinkling of water to recall Baptism may take place.
Glory to God: On Sundays, solemnities, and feasts, the Gloria follows the Penitential Act. The Gloria begins by echoing the proclamation of the angels at the birth of Christ: “Glory to God in the highest!” In this ancient hymn, the gathered assembly joins the heavenly choirs in offering praise and adoration to the Father and Jesus through the Holy Spirit.
- Collect: The Introductory Rites conclude with an opening prayer, called the Collect. The celebrant invites the gathered assembly to pray and, after a brief silence, proclaims the prayer of the day. The Collect gathers the prayers of all into one and disposes all to hear the Word of God in the context of the celebration.
Liturgy of the Word
Most of the Liturgy of the Word is made up of readings from Scripture. On Sundays and solemnities, there are three Scripture readings. During most of the year, the first reading is from the Old Testament and the second reading is from one of the New Testament letters. During Easter Time, the first reading is taken from the Acts of the Apostles which tells the story of the Church in its earliest days. The last reading is always taken from one of the four Gospels.
In the Liturgy of the Word, the Church feeds the people of God from the table of his Word (cf. Sacrosanctum Concilium, no. 51). The Scriptures are the word of God, written under the inspiration of the Holy Spirit. In the Scriptures, God speaks to us, leading us along the path to salvation.
- First Reading
- Responsorial Psalm: The Responsorial Psalm is sung between the readings. The psalm helps us to meditate on the word of God.
- Second Reading (on Sundays and solemnities)
- Gospel Acclamation
- Gospel: The high point of the Liturgy of the Word is the reading of the Gospel. Because the Gospels tell of the life, ministry, and preaching of Christ, it receives several special signs of honor and reverence. The gathered assembly stands to hear the Gospel and it is introduced by an acclamation of praise. Apart from Lent, that acclamation is “Alleluia,” derived from a Hebrew phrase meaning “Praise the Lord!” A deacon (or, if no deacon is present, a priest) reads the Gospel.
- Homily: After the Scripture readings, the celebrant preaches the homily. In the homily, the preacher focuses on the Scripture texts or some other texts from the liturgy, drawing from them lessons that may help us to live better lives, more faithful to Christ’s call to grow in holiness.
- Profession of Faith (on Sundays, solemnities, and special occasions): In many Masses, the Profession of Faith then follows the homily, either the Nicene or Apostles’ Creed. The Nicene Creed is a statement of faith dating from the fourth century, while the Apostles’ Creed is the ancient baptismal creed of the Church in Rome. If baptismal promises are renewed, from a formula based on the Apostles’ Creed, this takes the place of the Creed.
- Universal Prayer: The Liturgy of the Word concludes with the Universal Prayer, also called the Prayer of the Faithful. The gathered assembly intercedes with God on behalf of the Church, the world, and themselves, entrusting their needs to the faithful and loving God.
Liturgy of the Eucharist
The Liturgy of the Eucharist begins with the preparation of the gifts and the altar. As the ministers prepare the altar, representatives of the people bring forward the bread and wine that will become the Body and Blood of Christ. The celebrant blesses and praises God for these gifts and places them on the altar, the place of the Eucharistic sacrifice. In addition to the bread and wine, monetary gifts for the support of the Church and the care of the poor may be brought forward. The Prayer over the Offerings concludes this preparation and disposes all for the Eucharistic Prayer.
- Presentation of the Gifts and Preparation of the Altar
- Prayer over the Offerings
- Eucharistic Prayer: The Eucharistic Prayer is the heart of the Liturgy of the Eucharist. In this prayer, the celebrant acts in the person of Christ as head of his body, the Church. He gathers not only the bread and the wine, but the substance of our lives and joins them to Christ’s perfect sacrifice, offering them to the Father. The introductory dialogue, establishes that this prayer is the prayer of the baptized and ordained, is offered in the presence of God, and has thanksgiving as its central focus. Following this dialogue, the celebrant begins the Preface. The Eucharistic Prayers make clear that these prayers are offered, not to Christ, but to the Father. It is worship offered to the Father by Christ as it was at the moment of his passion, death and resurrection, but now it is offered through the priest acting in the person of Christ, and it is offered as well by all of the baptized, who are part of Christ’s Body, the Church. This is the action of Christ’s Body, the Church at Mass.
- Holy, Holy, Holy
- First half of prayer, including Consecration
- Mystery of Faith
- Second half of prayer, ending with Doxology
- The Lord’s Prayer
- Sign of Peace
- Lamb of God
- Prayer after Communion
- Optional announcements
- Greeting and Blessing