"In Baptism we have been called to form but one body. The Eucharist fulfills this call: 'The cup of blessing which we bless, is it not a participation in the blood of Christ? the bread which we break, is it not a participation in the body of Christ? Because there is one bread, we who [...]
"To the offering of Christ are united not only the members still here on earth, but also those already in the glory of heaven. In communion with and commemorating the Blessed Virgin Mary and all the saints, the Church offers the Eucharistic sacrifice. In the Eucharist the Church is as it were at the foot [...]
"The Eucharist is also the sacrifice of the Church. The Church which is the Body of Christ participates in the offering of her Head. With him, she herself is offered whole and entire. She unites herself to his intercession with the Father for all men. In the Eucharist the sacrifice of Christ becomes also the [...]
"The bread and wine become in a sense a symbol of all that the eucharistic assembly brings, on its own part, as an offering to God and offers spiritually." Source: Pope St. John Paul II, LETTER DOMINICAE CENAE OF THE SUPREME PONTIFF JOHN PAUL II TO ALL THE BISHOPS OF THE CHURCH ON THE [...]
"The Mass, too, has an engagement which corresponds to the Offertory of the Mass, in which the faithful bring gifts of bread and wine, or its equivalent, that which buys bread and wine. As the ring is a symbol of the lover offering himself to the beloved, so too, the bread and wine are the [...]
"The Mass has three important parts: the Offertory, the Consecration, and the Communion. In the order of human love, these correspond to engagement, the marriage ceremony, and the consummation of the marriage." Source: Ven. Fulton Sheen, These are the Sacraments
"The presentation of the offerings (the Offertory). Then, sometimes in procession, the bread and wine are brought to the altar; they will be offered by the priest in the name of Christ in the Eucharistic sacrifice in which they will become his body and blood. It is the very action of Christ at the Last [...]