Introductory Rites
Entrance • Greeting • Penitential Act • Kyrie • Gloria • Collect
One people becomes a worshipping assembly.GIRM 46–54The Holy Sacrifice of the Mass
The Mass is thanksgiving, memorial, sacrifice, presence, communion, and mission. At its heart, the Church does not crucify Christ again: his one sacrifice of Calvary is made sacramentally present, and the baptized learn to offer themselves with him.
GIRM 27–90 • CCC 1322–1419The General Instruction names two principal parts—the Liturgy of the Word and the Liturgy of the Eucharist—so closely joined that they form one act of worship. Introductory and Concluding Rites open and complete that single action.
Entrance • Greeting • Penitential Act • Kyrie • Gloria • Collect
One people becomes a worshipping assembly.GIRM 46–54Readings • Psalm • Gospel • Homily • Creed • Universal Prayer
Christ is present in his proclaimed Word.GIRM 55–71Preparation of the Gifts • Eucharistic Prayer • Communion
The Paschal Sacrifice and banquet are celebrated.GIRM 72–89Announcements • Blessing • Dismissal • Reverence to the altar
What is celebrated becomes a life of witness and good works.GIRM 90Luke 24 is not a rubrical manual, but its liturgical pattern is unmistakable: Christ gathers disciples, opens the Scriptures, is recognized in the breaking of bread, and turns them back toward witness.
Christ joins the disciples on the road.
Luke 24:15Moses and the prophets disclose the Paschal mystery.
Luke 24:27, 32Their eyes are opened and they recognize him.
Luke 24:30–31, 35Encounter becomes proclamation and mission.
Luke 24:33–35Christ is really present in several distinct ways. These are not interchangeable: his presence under the Eucharistic species is unique and substantial.
“Where two or three are gathered together in my name…”
Matthew 18:20The ordained priest acts sacramentally in the person of Christ the Head.
GIRM 27 • SC 7When the Scriptures are read in the Church, Christ himself speaks to his people.
GIRM 29 • SC 7Christ is present truly, really, and substantially—Body, Blood, Soul, and Divinity.
GIRM 27 • CCC 1374The center and high point of the celebration is one prayer addressed to the Father, through the Son, in the Holy Spirit. The whole assembly joins Christ’s praise and offering.
The Preface praises the Father for the work of salvation.
Earth joins the heavenly powers in the Sanctus.
The Church invokes the Holy Spirit upon the gifts.
Christ’s words and actions at the Last Supper are sacramentally enacted.
The Church keeps the memorial of Christ’s saving Passion, Resurrection, and Ascension.
The spotless Victim is offered; the faithful learn to offer themselves.
Earth and heaven, living and dead, are held within the prayer of the Church.
All glory returns to the Father through the Son; the people ratify the prayer.
None can be separated from the others. The same Christ who offered himself once for all gives that one saving act sacramental presence and feeds his covenant people with his Body and Blood.
“This is my body… This cup is the new covenant in my blood.”
1 Corinthians 11:23–26Christ’s single, perfect self-offering cannot be repeated.
Hebrews 9:24–28 • 10:10–14The Church enters the memorial, offers the spotless Victim, and is nourished at the Paschal banquet.
GIRM 72, 79–80 • CCC 1366–1368Writing in Rome around AD 155, St. Justin Martyr described Sunday Christian worship. The language and local ceremonies developed, but the underlying movement is strikingly recognizable.
First Apology 65–67
Continuity does not mean every word and gesture was already identical. It means the Church’s received pattern—Word, common prayer, Eucharistic thanksgiving, Communion, and charity—can be recognized across the centuries.