The liturgical celebration of the Eucharist makes the New Passover of Christ present again in three ways:
This threefold commemoration of the Eucharist is reflected in the various prayers of the Memorial Acclamation, for example: "When we eat this Bread and drink this Cup, / we proclaim your Death, O Lord / until you come again." (Cf. CCC 1403, 1409)
The Mass is a Sacrifice because it is a participation in the one Sacrifice of Christ, which is made present through the Eucharistic liturgy.
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