12 Things Catholics Should Never Do at Mass (And 6 Things They Always Should)
Scripture & CCC Guide
Introduction
The Holy Sacrifice of the Mass is the source and summit of the Christian life (CCC 1324). At every Mass, heaven and earth meet: Christ offers Himself to the Father through the ministry of the priest, and the faithful are invited to unite their own lives to that perfect offering. It is, quite simply, the most sacred event on earth.
Yet precisely because we are human — distracted, hurried, habitual — it is easy to drift into behaviors that diminish our participation or, worse, show disrespect to the Real Presence of Christ in the Eucharist. Drawing on Sacred Scripture, the Catechism of the Catholic Church (CCC), and the Church's liturgical tradition, here are 12 things Catholics should never do at Mass — and 6 things they should always do.
12 Things Catholics Should Never Do at Mass
1. Arrive Late Without Serious Reason
The Mass begins with the Introductory Rites — the Penitential Act, the Gloria, and the Collect — all of which form an essential part of the liturgy. Habitually arriving late communicates, however unintentionally, that the Mass is a performance one can slip into rather than a sacred covenant gathering one enters fully.
Scripture: "Let us not give up meeting together, as some are in the habit of doing, but let us encourage one another" (Hebrews 10:25).
CCC: "The faithful are obliged to participate in the Eucharist on days of obligation" (CCC 2042), which implies full, conscious participation from the beginning.
2. Use Your Phone During Mass
Scrolling through notifications, texting, or checking social media during Mass is a grave act of irreverence — not merely a matter of etiquette, but of the soul's orientation. You cannot simultaneously attend to God and to your screen.
Scripture: "Be still, and know that I am God" (Psalm 46:10). "No one can serve two masters" (Matthew 6:24).
3. Receive Holy Communion in a State of Mortal Sin
This is perhaps the most serious item on this list. The Church is unambiguous: receiving the Eucharist unworthily is a grave offense against the Body and Blood of Christ.
Scripture: "Whoever eats the bread or drinks the cup of the Lord in an unworthy manner will be guilty of sinning against the body and blood of the Lord. Everyone ought to examine themselves before they eat of the bread and drink from the cup. For those who eat and drink without discerning the body of Christ eat and drink judgment on themselves" (1 Corinthians 11:27–29).
CCC: "Anyone who is aware of having sinned mortally must not receive communion without having received absolution from a priest" (CCC 1385).
4. Chew Gum or Consume Food During Mass
Catholics are required to observe a Eucharistic fast — abstaining from food and drink (except water and medicine) for at least one hour before receiving Communion (CCC 1387). Chewing gum or eating during Mass violates both this fast and the reverence owed to the sacred liturgy.
CCC: "To prepare for worthy reception of this sacrament, the faithful should observe the fast required in their Church" (CCC 1387).
5. Engage in Idle Chatter Before, During, or After Mass
The church is a sacred space where Christ is truly present in the tabernacle. Loud socializing before or after Mass — and especially during — fails to honor that presence and disturbs the prayer of others.
Scripture: "But the Lord is in his holy temple; let all the earth be silent before him" (Habakkuk 2:20). "Guard your steps when you go to the house of God. Go near to listen rather than to offer the sacrifice of fools" (Ecclesiastes 5:1).
6. Dress Immodestly or Inappropriately
How we dress for Mass communicates what we believe about where we are and who we are meeting. Clothing that is revealing, overly casual, or attention-drawing is incompatible with the reverence owed to the Eucharistic Lord.
Scripture: "I also want the women to dress modestly, with decency and propriety" (1 Timothy 2:9). The same principle applies to men.
CCC: "Bodily demeanor (gestures, clothing) ought to convey the respect, solemnity, and joy of this moment when Christ becomes our guest" (CCC 1387).
7. Leave Mass Early Without Serious Reason
The Mass concludes with the dismissal — the word missa, from which "Mass" derives, literally means "sent forth." Leaving before the final blessing deprives the faithful of the Church's formal sending into the world and is a sign of treating the liturgy as a transaction rather than an encounter.
Scripture: "Remain in my love" (John 15:9). The disciples on the road to Emmaus recognized Christ in the breaking of the bread — and then went forth transformed (Luke 24:13–35).
8. Fail to Genuflect or Reverence the Tabernacle
When entering a pew or passing before the tabernacle where the Blessed Sacrament is reserved, Catholics are expected to genuflect on the right knee as an act of adoration of Christ truly present. Failing to do so is a failure of faith made visible.
Scripture: "At the name of Jesus every knee should bow, in heaven and on earth and under the earth" (Philippians 2:10).
CCC: "Because Christ himself is present in the sacrament of the altar, he is to be honored with the worship of adoration" (CCC 1418).
9. Allow Children to Behave Disruptively Without Correction
Children are welcome at Mass — indeed, the Church encourages families to worship together. But parents bear the responsibility of teaching children reverence and, when necessary, stepping out briefly rather than allowing ongoing disruption that impedes the worship of others.
Scripture: "Train up a child in the way he should go; even when he is old he will not depart from it" (Proverbs 22:6).
10. Receive Communion Without Proper Disposition or Gesture
Catholics must receive Communion in a spirit of faith and reverence — whether on the tongue or in the hand (where permitted), with a bow or genuflection beforehand, and with an interior act of adoration. Receiving casually, without awareness of what one is receiving, is deeply contrary to Eucharistic faith.
CCC: "It is in keeping with the infinite respect due to the Eucharist that the faithful, before receiving communion, make the prescribed gesture of reverence" (GIRM 160).
11. Treat the Sign of Peace as a Social Moment
The Sign of Peace is a liturgical act — an expression of ecclesial communion and a preparation for receiving the Body of Christ. It is not an opportunity for extended greetings, hugging, or moving through the church to find friends. The USCCB and the Vatican have both cautioned against the Sign of Peace becoming a social disruption.
CCC: "The Eucharist is also the sacrifice of the Church... The faithful who are properly disposed and who present themselves to receive [it] enter into communion with Christ" (CCC 1382).
12. Withhold the Tithe or Offering from Indifference
The offertory is not merely a practical collection — it is a liturgical act in which the faithful unite their material gifts with Christ's offering. Consistently refusing to contribute, when one is able, reflects a failure to participate fully in the sacrificial dimension of the Mass.
Scripture: "Each of you should give what you have decided in your heart to give, not reluctantly or under compulsion, for God loves a cheerful giver" (2 Corinthians 9:7). "Bring the whole tithe into the storehouse" (Malachi 3:10).
6 Things Catholics Should Always Do at Mass
1. Arrive Early and Pray Before Mass Begins
Arriving five to ten minutes early allows the soul to transition from the noise of daily life into the sacred silence of God's house. Use this time for personal prayer, an examination of conscience, or quiet meditation on the day's readings.
Scripture: "In the morning, Lord, you hear my voice; in the morning I lay my requests before you and wait expectantly" (Psalm 5:3).
CCC: "The faithful... should prepare themselves to encounter their Lord" (CCC 1385).
2. Participate Fully, Consciously, and Actively
The Second Vatican Council called for the actuosa participatio — the active participation of all the faithful in the sacred liturgy. This means praying the responses, singing the hymns, listening attentively to the readings, and engaging one's mind and heart throughout.
CCC: "The Church... earnestly desires that all the faithful should be led to that full, conscious, and active participation in liturgical celebrations" (CCC 1141, citing Sacrosanctum Concilium 14).
3. Listen Attentively to the Word of God
The Liturgy of the Word — comprising the First Reading, the Psalm, the Second Reading, the Gospel, and the Homily — is not a preliminary to the "real" Mass. It is an integral part of the one liturgical act through which Christ speaks to His people.
Scripture: "Faith comes from hearing the message, and the message is heard through the word about Christ" (Romans 10:17). "Is not my word like fire, declares the Lord, and like a hammer that breaks a rock in pieces?" (Jeremiah 23:29).
CCC: "Christ is present in his word since it is he himself who speaks when the holy Scriptures are read in the Church" (CCC 1088).
4. Receive Holy Communion Worthily and with Deep Reverence
The reception of the Eucharist is the high point of the Mass — the moment of most intimate union with Christ this side of heaven. Approach with a recent confession if needed, a Eucharistic fast observed, a bow or genuflection before receiving, and a heartfelt act of thanksgiving afterward.
Scripture: "I am the living bread that came down from heaven. Whoever eats this bread will live forever" (John 6:51).
CCC: "Holy Communion augments our union with Christ... It preserves, increases, and renews the life of grace received at Baptism" (CCC 1391–1392).
5. Make a Thanksgiving After Communion
The moments immediately following the reception of Holy Communion — while Christ is truly, physically present within us — are among the most precious of our entire lives. Spend them in silent, personal prayer of gratitude, love, and petition. Do not allow noise, distraction, or haste to rob you of this grace.
Scripture: "Mary treasured up all these things and pondered them in her heart" (Luke 2:19). We are called to do the same with the gift we have received.
6. Go Forth and Live the Mass
The dismissal — Ite, missa est — is not a permission to leave. It is a commission to go. The grace received at Mass is given not for our private enjoyment but to be poured out in service, charity, and witness in the world.
Scripture: "Go and make disciples of all nations" (Matthew 28:19). "You are the light of the world" (Matthew 5:14).
CCC: "The Eucharist commits us to the poor. To receive in truth the Body and Blood of Christ given up for us, we must recognize Christ in the poorest, his brethren" (CCC 1397).
Conclusion
The Mass is not a duty to be discharged or a box to be checked. It is the wedding feast of the Lamb (Revelation 19:9), the re-presentation of Calvary, and the foretaste of heaven. Every gesture, every posture, every act of reverence or irreverence at Mass is a statement of what we believe about who is truly present on that altar.
May we always approach the Holy Sacrifice with the faith of the centurion: "Lord, I am not worthy that you should enter under my roof, but only say the word and my soul shall be healed" (Matthew 8:8) — and with the love of Mary Magdalene, who knew that where Christ is, everything else fades away.