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.
As Catholics, we abide by the first precept of the Precepts of the Church requiring that all members of the Church attend Mass on Sundays and Holy Days of Obligation and refrain from those activities that would impede the proper sanctification of these days.
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