As part of our Holy Week worship life, we observe, in part, an ancient custom of the early Christian Church. Beginning with the evening worship on Holy Thursday and continuing through Holy Saturday's Easter Vigil, these services were considered to be one service and called the Triduum (The Three Days). Even though people go home to rest and carry out their necessary responsibilities, they are encouraged to remember that at least in spirit, they are still "worshiping" and remembering the events of Holy Week. No benediction concludes this service as an indication that the service continues for two more days.
Tonight, we remember the first Passover meal and celebrate the meal that was given to us when Jesus celebrated Passover---on the night when He was betrayed. Blood paints the way to salvation. Yet “not all the blood beasts” (Christian Worship #128) could for sin atone. Fulfilling the Old, the Lamb of God establishes the New Covenant in his own body and blood.