In stead of warning, why not explaining?
You can give him an overview of Mass so he will have a better understanding.
Mass, in memory of the death and resurrection of Christ, nourishes our souls and renews our spirits. It includes two major parts:
1.Liturgy of the Word
- Entrance
- Introductory rites
- Penitential rite
- Readings from Scripture
- Liturgy of the Eucharist
When people bring bread, wine and donation to the front, the whole congregation participate as following:
We offer ourselves and all that we have. The Lord can take what is temporal and make it eternal, take what is human and make it divine. The offering of the laity includes: our work, prayers, apostolic endeavors, ordinary married and family life, daily labor… all of these become spiritual sacrifices acceptable to God through Jesus Christ.
During the celebration of the Eucharist all our sacrifices are most lovingly offered to the Father along with the Lord’s body. Everything we have goes on the altar, to be made holy in Christ. “By the mystery of this water and wine, may we come to share in the divinity of Christ, Who humbled Himself to share in our humanity.”
The climax is the Eucharistic sacrifice. The priest places his hands over the gifts and call down the Holy Spirit. This is the moment the Spirit and the Word transform the elements from bread and wine into the body and blood, soul and divinity of Jesus Christ.
We can’t overemphasize the relationship between “our daily bread” and the Eucharistic host.
We say “Our Father….” Then give the “sign of Peace”, and next prayer is
“Lamb of God”, “Lord, I am not worthy to receive You, but only say the word, I shall be healed.” (Mathew 8:8)
Then we receive Him in Holy Communion. When the body and blood are inside us, that is the most intimate moment with the Lord. Pray to Him.
Mass is a sending-forth. We have united ourselves to Christ’s sacrifice. We leave Mass now in order to live the mystery, the sacrifice, we have just celebrated, through the splendor of ordinary life in the home and in the world.