The Mass makes present the once-and-for-all sacrifice of Jesus on the cross. Therefore, to enter into the spirit of the Mass, we must “proclaim the death of the Lord” (1 Cor 11:26) and offer our bodies to the Lord as living sacrifices (Rm 12:1). The spirit of the Mass is the spirit of sacrifice. Thus it is important to fast before Mass, deny ourselves, and take up our crosses each day (Lk 9:23) with the intention of uniting ourselves to Jesus crucified (see Gal 2:19) and sacrificed (see Heb 9:26). Through our “good deeds and generosity” (Heb 13:16), we make sacrifices pleasing to the Lord. We can unite these sacrifices with Jesus’ sacrifice on Calvary and fill up in our own bodies what is lacking in the “sufferings of Christ” (Col 1:24).
The Holy Mass is not the proclamation and perpetuation of our sacrifices but rather of His sacrifice. However, the Mass is the participation of our sacrifices in His. Live the Mass. Live a life of sacrifice. Through Jesus, “let us continually offer God a sacrifice of praise” (Heb 13:15).