The Preparation of the Altar
After the Universal Prayer, either while the collection is being taken or after it has been collected, the preparation of the altar takes place. The corporal, a square linen cloth used to catch the particles of the host, is unfolded and placed on the altar as are the chalice; the Roman Missal; the cups with wine to be consecrated, and the purificator(s), the rectangular cloth used to wipe the chalice and the cups. The preparation of the altar is properly done by the deacon, or in his absence, the celebrant.
The collection and the gifts for the celebration are brought forward in the Offertory. The bread and the wine used at Mass are brought by some of the congregation to the presider. This is an ancient practice, as is seen in the description of the offertory from the Mass in Justin’s First Apology,
Then bread and a cup of water and mixed wine are brought to the president of the brethren and he, taking them, sends up praise and glory to the Father of the universe through the name of the Son and of the Holy Spirit, and offers thanksgiving at some length that we have been deemed worthy to receive these things from him. When he has finished the prayers and the thanksgiving,816 the whole congregation present817 assents, saying, "Amen." "Amen" in the Hebrew language means, "So be it."
Though now, the mixing of the water and wine takes place just a little later in the Mass.
The wine must be natural from the fruit of the vine and not spoiled (canon 924 §3)--because then it is not wine, but vinegar. It must be wine from grapes, it cannot be, for example, cherry wine. Fortified wines such as port, which have other things like brandy, which is from grapes but is distilled and not fermented as wine is, cannot be used. As long as it is grape wine, it doesn’t matter if it is white, red, or rosé, sweet or dry. I have found for Communion wine, generally a sweeter wine is more acceptable to most palates, especially those of children.
The bread is to be “only wheat and recently made so that there is no danger of spoiling” (canon 924 §2). This means that you can not use bread made, for example, with rye, or to which has been added honey, or anything else. [There is a story that has been verified of one priest at Mass holding up a loaf of bread and announcing, “This is My Body—except for the raisins and cinnamon.” {Heavy sigh}]
I have heard it said that it takes a greater act of faith to believe that the host is bread, than to believe it is the Body of Christ. Still, it is the practice of the Latin Church to use the host for consecration. Canon 926 instructs:
According to the ancient tradition of the Latin Church, the priest is to use unleavened bread in the Eucharistic celebration whenever he offers it.
It is interesting to note that it does not say that leavened bread is forbidden; to say so would be problematic because the Eastern Churches have the tradition of using leavened bread for the Eucharist at their liturgies. If the Church said that leavened bread can never be used, then the Eastern Churches would not have Eucharist. However, since it is the ancient tradition of the Latin Church that unleavened bread be used, that is the norm and only under most extraordinary circumstances should leavened bread be used for the Mass. One such case would be when Bishop (later Cardinal) Nguyễn Văn Thuận was imprisoned for the Faith in Viet Nam, he would take what crumbs of bread he could get and consecrate them in his hand so that he could celebrate and receive the Eucharist.
These details of what can be used for the bread and wine are important. They affect the validity of the Eucharist, which means: Is it the Body, Blood, Soul, and Divinity of Jesus, or not? It must be wheat bread and grape wine. If it is not, it is invalid matter. I like Coke and Cool Ranch Doritos, but I cannot use them for Mass. Even if the words of consecration are said, they do not become the Body and Blood of Jesus; only if it is grape wine and wheat bread.
When the gifts have been received, the priest, deacon, and servers take the gifts to the altar. The deacon hands the bread to the priest, who prays (either inaudibly when there is a song being sung or aloud when there is not; most of our Sunday Masses would have a song, so the prayers are usually inaudible):
Blessed are you, Lord God of all creation, for through Your goodness we have received the bread we offer You: fruit of the earth and work of human hands, it will become for us the bread of life.
If this is done audibly, the people respond:
Blessed be God for ever.
The Deacon, or in his absence the Priest, pours wine and a little water into the chalice, saying quietly:
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.
This is another example (but not the last) of the practical at the Mass becoming symbolic. In ancient times wine was made very strong and had to be diluted with water. It has now come to symbolize the Incarnation where the divinity and humanity of Jesus are joined in such a way as that they cannot be separated any more than wine and water once mixed can be separated back into their original forms.
The deacon hands the chalice to the priest who prays (either inaudibly or aloud as with the bread as above):
Blessed are You, Lord God of all creation, for through Your goodness we have received the wine we offer You: fruit of the vine and work of human hands it will become our spiritual drink.
If prayed aloud, the people respond:
Blessed be God for ever.
These prayers echo the Jewish Berakah, a prayer that acknowledges God as the source of all blessings and transforms everyday actions and occurrences into religious experiences designed to increase awareness of God at all times. They usually begin:
Blessed are You, Lord our God, or
Blessed are You, Lord our God, King of the Universe.
We praise the God of all Creation Who gives us the stuff of creation—bread, water, wine—that is taken, blessed, broken and given to us for our re-creation. It recognizes the sacramental principle in the Church that the “common” can be and often is the way that God reveals and shares Himself with His people.
After the gifts have been presented, the priest, bowing profoundly, says quietly:
With humble spirit and contrite heart may we be accepted by You, O Lord, and may our sacrifice in Your sight this day
be pleasing to You, Lord God.