The Catholic Mass

A Walk Through the Mass:
A Step-by-Step Explanation
by Thomas Richstatter, O.F.M.
This article is a part of the St. Anthony Messenger Press Catholic Update Series. 

One day my friend Brad, who was interested in becoming Catholic, stopped by my house after attending a parish Mass. He wanted to ask some questions about the way we Catholics act in church. “Father,” he observed, “the thing that is most different between my former church and your church is that you Catholics always seem to know what is going to happen next! In my church we sit and listen and sing now and then, but in the Catholic liturgy you have to know what to do.”

Brad has a good point: We Catholics do “know what is going to happen next.” One of the basic, distinctive marks of our way of praying is ritual: We do things over and over. When the priest says, “The Lord be with you,” without any thought or hesitation the congregation responds, “And with your spirit.”* The priest says, “Let us pray,” and the congregation stands up.

Our daily lives have their rituals also: There are set ways of shaking hands, eating with a fork, responding to a letter. And when we are accustomed to a certain way of doing things we seldom ask why we do it that way. In the Eucharist, too, we have many ritual actions which we perform without asking why.

This “walk-through” explanation of the Mass will shed light on why we do what we do at Mass. I think these explanations will be helpful for the great numbers of Catholics who attend Mass regularly but don’t always remember the reasons behind the various actions of the Mass. They may be especially helpful for catechumens (those preparing to enter the Catholic Church) and visitors from other churches who are not familiar with the Catholic Church.


What is the Mass?

A good way to describe the Mass is to say that it is Holy Thursday, Good Friday and Easter Sunday made present today in ritual. It is not merely a meal which reminds us of the Last Supper, or a Passion Play which helps recall Good Friday, or a Sunrise Service which celebrates the Lord”s Resurrection. It is Holy Thursday, Good Friday and Easter Sunday.

The bishops at the Second Vatican Council brought together these three mysteries in a multifaceted description of the Mass: “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 in this way to entrust to his beloved Bride, 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 heart is filled with grace, and a pledge of future glory is given to us” ” (Constitution on the Sacred Liturgy, #42).

The basic “shape” of the ritual of the Mass can be described as a meal. This is not to say it is “just another meal” or that we are ignoring the Mass as sacrifice. Not at all. The point is, the shape of the Mass, even when viewed as sacrifice, is that of a meal. For our purposes, we can be greatly helped in our “walk through” the Mass if we remember this basic “meal shape.”

When friends gather for a meal, they sit and talk: Eventually they move to the table, say grace, pass the food and eat and drink, and finally take their leave and go home. On our walk through the Mass we will follow this same map: we will see ritual acts of 1) gathering, 2) storytelling, 3) meal sharing and 4) commissioning.


Part one: Gathering rites

Coming together, assembling, is at the heart of our Sunday worship. The reason behind each of the ritual actions of the first part of the Mass can be found in this word: gathering. The purpose of these rites is to bring us together into one body, ready to listen and to break bread together.

Greeters. In many churches today there will be someone at the door to greet you as you arrive for Sunday Mass:

We all like to be greeted and welcomed when we gather for a celebration. If the greeters (and we all should serve this function for one another) recognize that you are new to the parish, they will give you a special hello and be sure that you have the service books (or missalette or hymnal) and participation aids necessary to pray well with the assembly.

Use of water. One of the first things Catholics do when they come to church is dip their right hand in water and make the sign of the cross. This ritual is a reminder of our Baptism: We were baptized with water and signed with the cross. At every Mass we renew our promises to die to sin. It is Baptism that brings us to Church.

Genuflection. In medieval Europe, it was a custom to go down on one knee (to genuflect) before a king or person of rank. This secular mark of honor gradually entered the Church and people began to genuflect to honor the altar and the presence of Christ in the tabernacle before entering the pew. Today many people express their reverence with an even older custom and bow to the altar before taking their place.

Posture, song. When the Mass begins everyone stands up. Standing is the traditional posture of the Christian at prayer: It expresses our attentiveness to the word of God and our readiness to carry it out. Often we begin by singing together. What better way to gather than to unite our thoughts and our voices in common word, rhythm and melody.

Greeting. The priest will ask us to begin with the sign of the cross, again reminding us of Baptism, and will greet us, saying, “The Lord be with you.” You will hear this greeting frequently. It means many things. Like “good day” it can mean both “hello” and “good-bye.” It is both a wish (may the Lord be with you) and a profound statement of faith (as you assemble for worship, the Lord is with you). It is an ancient biblical greeting: Boaz returned from Bethlehem (we read in the Book of Ruth 2:4) and said to the reapers, “The Lord be with you!” The ritual response to this greeting is always the formula, “And with your spirit,”* by which we return the hello, the good wishes, the statement of faith.

Penitential Rite, Gloria. All the other ritual acts of this first part of the Mass are intended to gather us together into a worshiping assembly. Sometimes we are asked to pause and recall our common need for salvation (the Penitential Rite). Sometimes the hymn “Glory to God in the Highest” is sung or recited at this point. The “Gloria” has been a part of the Mass since about the sixth century! These longer hymns and responses are found in the service book (or the missalette) at our seat.

Opening Prayer. At the close of this first part of the Mass the priest will ask us to join our minds in prayer, and after a few moments of silence he will collect our intentions into one prayer to which we all respond “Amen,” a Hebrew word for “So be it.”


Part two: Story telling

Liturgy of the Word. When we gather at a friend”s home for a meal, we always begin with conversation, telling our stories. At Mass, after the rites of gathering, we sit down and listen as readings from the Word of God are proclaimed. They are the stories of God”s people.

Three readings and a psalm. On Sundays there are three readings from the Bible. The first reading will be from the Hebrew Scriptures. We recall the origins of our covenant. It will relate to the Gospel selection and will give background and an insight into the meaning of what Jesus will do in the Gospel. Then we will sing or recite a psalm—a song from God”s own inspired hymnal, the Book of Psalms of the Hebrew Bible. The second reading will usually be from one of the letters of Paul or another apostolic writing. The third reading will be taken from one of the four Gospels.

Some visitors to the Catholic Mass are surprised to find us reading from the Bible! We Catholics have not generally been famous for our Bible reading, and yet the Mass has always been basically and fundamentally biblical. Even some Catholics might be surprised to learn how much of the Mass is taken from the Bible: Not only the three readings and the psalm, not only the obviously biblical prayers such as the Holy, Holy, Holy and the Lord”s Prayer, but most of the words and phrases of the prayers of the Mass are taken from the Bible.

Standing for the Gospel. Because of the unique presence of Christ in the proclamation of the Gospel, it has long been the custom to stand in attentive reverence to hear these words. We believe that Christ “is present in his word, since it is he himself who speaks when the holy Scriptures are read in the church” (Constitution on the Sacred Liturgy, #7). The priest will again greet us with “The Lord be with you.” He then introduces the Gospel reading while marking a small cross on his forehead, lips and heart with his thumb while praying silently that God cleans his mind and his heart so that his lips may worthily proclaim the Gospel. In many places, the congregation performs this ritual action along with the priest. The Gospel reading concludes with the ritual formula “The Gospel of the Lord” and we respond, “Praise to you, Lord Jesus Christ,” again proclaiming our faith in the presence of Christ in the word. Then we sit for the homily.

Homily. Homily (which replaced the word sermon for many) is a new word for Catholics. It means more than just a sermon or a talk about how we are to live or what we are to believe. It is an act of worship rooted in the texts of the Mass and especially in the readings from Scripture which have just been proclaimed. The homily takes that word and brings it to our life situation today. Just as a large piece of bread is broken to feed individual persons, the word of God must be broken open so it can be received and digested by the congregation.

Creed. The homily is often followed by a few moments of silence during which we each thank God for the word we have heard and apply the message of today”s readings to our daily living. We then stand and together recite the creed. (You will probably want to use the service book or missalette for the text of the creed if you do not know it by heart.) The creed is more than a list of things which we believe. It is a statement of our faith in the word we have heard proclaimed in the Scripture and the homily, and a profession of the faith that leads us to give our lives for one another as Christ gave his life for us. Originally the creed was the profession of faith of those about to be baptized at this point in the Mass.

General Intercessions. The Liturgy of the Word (our “storytelling” part of the Mass) comes to an end with the General Intercessions.

The General Intercessions help us become who God is calling us to be. We are the Body of Christ by Baptism. Now, as we prepare to approach the table for Eucharist, we look into the readings, like a mirror, and ask: Is that who we are? Does the Body of Christ present in this assembly resemble that Body of Christ pictured in the Scripture readings? Usually not! And so we make some adjustments; we pray that our assembly really comes to look like the Body of Christ, a body at peace, with shelter for the homeless, healing for the sick, food for the hungry.

We pray for the Church, nations and their leaders, people in special need and the local needs of our parish—the petitions usually fall into these four categories. A minister will announce the petitions, and we are usually given an opportunity to pray for the intentions in our heart, making some common response aloud like, “Lord, hear our prayer.”

Part three: Meal sharing

After the readings, we move to the table. As at a meal in the home of a friend, we 1) set the table, 2) say grace and 3) share the food (we eat and drink). At Mass these ritual actions are called 1) the Preparation of the Gifts, 2) the Eucharistic Prayer, 3) the Communion Rite.

Preparation of the Gifts

The early Christians each brought some bread and wine from their homes to the church to be used for the Mass and to be given to the clergy and the poor. Today a similar offering for the parish and the poor is made with our monetary contributions. Members of the parish will take up a collection from the assembly and bring it to the priest at the altar with the bread and wine to be used for the sacrifice. The priest places the bread and wine on the table. He then mixes water with the wine and washes his hands to help us think of the Last Supper. (Mixing water with wine and washing hands are things all Jews did at meals in Jesus” day.) Finally, he invites us to pray that the sacrifice be acceptable to God. We respond “Amen” to the Prayer Over the Gifts and stand to participate in the central prayer of the Mass.

The Eucharistic Prayer

The long prayer which follows brings us to the very center of the Mass and the heart of our faith. While the words of the prayer may vary from Sunday to Sunday, the prayer always has this structure: 1) We call upon God to remember all the wonderful saving deeds of our history. 2) We recall the central event in our history, Jesus Christ, and in particular the memorial he left us on the night before he died. We recall his passion, death and resurrection. 3) After gratefully calling to mind all the wonderful saving acts God has done for us in the past, we petition God to continue those deeds of Christ in the present: We pray that we may become one body, one spirit in Christ.

Invitation. The prayer begins with a dialogue between the leader and the assembly. First, the priest greets us with “The Lord be with you.” He then asks if we are ready and willing to approach the table and to renew our baptismal commitment, offering ourselves to God: “Lift up your hearts.” And we say that we are prepared to do so: “We lift them up to the Lord.” We are invited to give thanks to the Lord our God. And we respond: “It is right to give him thanks and praise.” To give “thanks and praise” translates the traditional Greek verb which now names the whole action: Eucharist.

Preface and Acclamation.The priest enters into the Preface, a prayer which prepares us to come before the face of God. We are brought into God”s presence and speak of how wonderful God has been to us. As the wonders of God are told, the assembly cannot hold back their joy and sing aloud: “Wow! Wow! Wow! What a God we have!” In the ritual language of the Mass, this acclamation takes the form: “Holy, holy, holy Lord, God of power and might, heaven and earth are full of your glory.”

Institution Narrative: Consecration. The priest continues the prayer, giving praise and thanks, and calling upon the Holy Spirit to change our gifts of bread and wine into the Body and Blood of Christ. He then recalls the events of the Last Supper—the institution of the Eucharist. At this important moment in the prayer, we proclaim the mystery of faith. Several texts are possible, for example: “Christ has died, Christ is risen, Christ will come again.” The priest continues recalling the wonderful deeds of salvation: the passion, death and resurrection of Christ.

Prayer for unity and intercessions. The grateful memory of God”s salvation leads us to make a bold petition, our main petition at every Eucharist: We pray for unity. “May all of us who share in the body and blood of Christ be brought together in unity by the Holy Spirit” (Eucharistic Prayer II). To this petition we add prayers for the Bishop of Rome and for the bishop of the local Church; we pray for the living and the dead and especially for ourselves, that through the intercession of the saints we may one day arrive at that table in heaven of which this table is only a hint and a taste.

We look forward to that glorious day and raise our voices with those of all the saints who have gone before us as the priest raises the consecrated bread and wine and offers a toast, a doxology, a prayer of glory to God in the name of Christ: “Through him, with him, and in him, in the unity of the Holy Spirit, all glory and honor is yours, almighty Father, for ever and ever.” Our “Amen” to this prayer acclaims our assent and participation in the entire Eucharistic prayer.


The Communion Rite

Our Father and Sign of Peace. We prepare to eat and drink at the Lord”s table with those words taught us by Jesus: “Give us this day our daily bread; and forgive us our trespasses as we forgive those who trespass against us.” Keenly aware that communion (the word means “union with”) is the sign and source of our reconciliation and union with God and with one another, we make a gesture of union and forgiveness with those around us and offer them a sign of peace.

Invitation to Communion. The priest then shows us the Body of Christ and invites us to come to the table: “This is the Lamb of God….Happy are those who are called to his supper.” The members of the assembly now approach the altar in procession.

Communion. As God fed our ancestors in the desert on their pilgrimage, so God gives us food for our journey. We approach the minister who gives us the eucharistic bread with the words “The Body of Christ,” and we respond, “Amen.” We then go to the minister with the cup who gives it to us with the words “The Blood of Christ,” to which we again profess our “Amen.” During this procession we usually sing a hymn which unites our voices, minds and thoughts, even as the Body and Blood of Christ unites our bodies. Then we pray silently in our hearts, thanking and praising God and asking for all that this sacrament promises. The priest unites our prayers in the Prayer After Communion, to which we respond, “Amen.”


Part four: Commissioning

Announcements. Finally we prepare to go back to that world in which we will live for the coming week. The burdens we have laid down at the door of the church for this Eucharist, we know we must now bear again—but now strengthened by this Eucharist and this community. There may be announcements at this time which remind us of important activities coming up in the parish. The priest again says, “The Lord be with you”—the ritual phrase serves now as a farewell.

Blessing and Dismissal. We bow our heads to receive a blessing. As the priest names the Trinity—Father, Son and Holy Spirit—we make the sign of the cross. The priest or deacon then dismisses the assembly: “Go in peace…” and we give our liturgical “yes” by saying, “Thanks be to God.”

Living the Eucharist in the world. We leave the assembly and the church building— but we carry something with us. A newly married couple leave their wedding ceremony but carry their marriage with them. And what happens in the days and years after the wedding gives deeper meaning to the symbols they have exchanged (for example, their rings) at the wedding.

The same is true of the Eucharist. What happens in our lives during the week gives deeper meaning to the ritual actions we have celebrated at Mass. As we daily carry our brokenness for love of the crucified, we find ever deeper meaning in the broken bread. As we pour out our lives in love for the homeless and the alienated, we find meaning in the cup poured out. It is only in relation to our daily lives that the full meaning of the ritual actions of the Mass becomes clear to us.

Thomas Richstatter, O.F.M., has a doctorate in theology from the Institut Catholique de Paris. A popular writer and lecturer, Father Richstatter teaches sacramental and liturgical theology at St. Meinrad (Indiana) School of Theology.


*reflects the change in the Roman Missal implemented in 2011.  This article was written prior to those changes.  The original words in the article and Mass were “And also with you.”

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