The Spirit and the Church cooperate to manifest Christ and his work of salvation in the liturgy. Primarily in the Eucharist, and by analogy in the other sacraments, the liturgy is the memorial of the mystery of salvation. the Holy Spirit is the Church’s living memory.
The Word of God. The Holy Spirit first recalls the meaning of the salvation event to the liturgical assembly by giving life to the Word of God, which is proclaimed so that it may be received and lived:
In the celebration of the liturgy, Sacred Scripture is extremely important. From it come the lessons that are read and explained in the homily and the psalms that are sung. It is from the Scriptures that the prayers, collects, and hymns draw their inspiration and their force, and that actions and signs derive their meaning.
The Holy Spirit gives a spiritual understanding of the Word of God to those who read or hear it, according to the dispositions of their hearts. By means of the words, actions, and symbols that form the structure of a celebration, the Spirit puts both the faithful and the ministers into a living relationship with Christ, the Word and Image of the Father, so that they can live out the meaning of what they hear, contemplate, and do in the celebration.
“By the saving word of God, faith . . . is nourished in the hearts of believers. By this faith then the congregation of the faithful begins and grows.” The proclamation does not stop with a teaching; it elicits the response of faith as consent and commitment, directed at the covenant between God and his people. Once again it is the Holy Spirit who gives the grace of faith, strengthens it and makes it grow in the community. The liturgical assembly is first of all a communion in faith.
Anamnesis. The liturgical celebration always refers to God’s saving interventions in history. “The economy of Revelation is realized by deeds and words which are intrinsically bound up with each other…. (The) words for their part proclaim the works and bring to light the mystery they contain.” In the Liturgy of the Word the Holy Spirit “recalls” to the assembly all that Christ has done for us. In keeping with the nature of liturgical actions and the ritual traditions of the churches, the celebration “makes a remembrance” of the marvelous works of God in an anamnesis which may be more or less developed. The Holy Spirit who thus awakens the memory of the Church then inspires thanksgiving and praise (doxology).
Christian liturgy not only recalls the events that saved us but actualizes them, makes them present. The Paschal mystery of Christ is celebrated, not repeated. It is the celebrations that are repeated, and in each celebration there is an outpouring of the Holy Spirit that makes the unique mystery present.
The Epiclesis (“invocation upon”) is the intercession in which the priest begs the Father to send the Holy Spirit, the Sanctifier, so that the offerings may become the body and blood of Christ and that the faithful by receiving them, may themselves become a living offering to God.
Together with the anamnesis, the epiclesis is at the heart of each sacramental celebration, most especially of the Eucharist:
You ask how the bread becomes the Body of Christ, and the wine . . . the Blood of Christ I shall tell you: the Holy Spirit comes upon them and accomplishes what surpasses every word and thought . . . Let it be enough for you to understand that it is by the Holy Spirit, just as it was of the Holy Virgin and by the Holy Spirit that the Lord, through and in himself, took flesh.
The Holy Spirit’s transforming power in the liturgy hastens the coming of the kingdom and the consummation of the mystery of salvation. While we wait in hope he causes us really to anticipate the fullness of communion with the Holy Trinity. Sent by the Father who hears the epiclesis of the Church, the Spirit gives life to those who accept him and is, even now, the “guarantee” of their inheritance.
In every liturgical action the Holy Spirit is sent in order to bring us into communion with Christ and so to form his Body. the Holy Spirit is like the sap of the Father’s vine which bears fruit on its branches. The most intimate cooperation of the Holy Spirit and the Church is achieved in the liturgy. the Spirit who is the Spirit of communion, abides indefectibly in the Church. For this reason the Church is the great sacrament of divine communion which gathers God’s scattered children together. Communion with the Holy Trinity and fraternal communion are inseparably the fruit of the Spirit in the liturgy.
The epiclesis is also a prayer for the full effect of the assembly’s communion with the mystery of Christ. “The grace of the Lord Jesus Christ and the love of God and the fellowship of the Holy Spirit” have to remain with us always and bear fruit beyond the Eucharistic celebration. the Church therefore asks the Father to send the Holy Spirit to make the lives of the faithful a living sacrifice to God by their spiritual transformation into the image of Christ, by concern for the Church’s unity, and by taking part in her mission through the witness and service of charity.
From the Catechism of the Catholic Church 1099-1109