The Paschal Mystery
In the Old Testament the liturgy of the temple was tied to the sacrificial system, i.e. temple practices and sacrifice were connected to the need to vouchsafe the temple for the presence of God. In the New Testament the Holy Spirit was poured out on the Day of Pentecost upon the Church and all true Disciples of Christ. The sacrificial nature of Old Testament worship is coterminous with the sacrificial nature of the Eucharist. The liturgy as an act of worship is a sacrifice and “the whole worship of the church could be said to be Eucharistic ” (Chan, 141). By engaging in worship in the Mass we are enacting the Gospel, the paschal mystery or “the central saving event of the Old Testament” (Chan, 141). The Holy Spirit manifests himself through the Real Presence, i.e. we sit down at the table with Christ on one side and us on the other partaking of the elements.