Steve Pimentel explains in this essay how liturgical worship—beginning with the sacrifices in the Old Testament and culminating in the celebration of the Eucharist—re-presents the works of God, “by which He restores mankind to communion with Himself.” The pinnacle of these covenants, Christ’s sacrifice on the Cross, is represented in the Eucharist. Pimentel gives an overview of the covenantal liturgies, beginning with the Old Testament; he shows how they are fulfilled in the New Testament, in the Last Supper, and continuing to our own day every time the Mass is celebrated.