1 Corinthians 11: 23-26
11:24, 25 What does the Lord's Supper mean? The early church remembered that Jesus instituted the Lord's Supper on the night of the Passover meal (Luke 22:13-20). Just as Passover celebrated deliverance from slavery in Egypt, so the Lord's Supper celebrates deliverance from sin by Christ's death.
Christians pose several different possibilities for what Christ meant when he said, "This is my body." (1) Some believe that the wine and bread actually become Christ's physical blood and body. (2) Others believe that the bread and wine remain unchanged, but Christ is spiritually present with the bread and wine. (3) Still others believe that the bread and wine symbolize Christ's body and blood. Christians generally agree, however, that participating in the Lord's Supper is an important element in the Christian faith and that Christ's presence, however we understand it, strengthens us spiritually.
11:25 What is this new covenant? In the old covenant, people could approach God only through priests and the sacrificial system. Jesus' death on the cross ushered in the new covenant or agreement between God and us. Now all people can personally approach God and communicate with him. The people of Israel first entered into this agreement after their exodus from Egypt (Exodus 24), and it was designed to point to the day when Jesus Christ would come. The new covenant completes, rather than replaces, the old covenant, fulfilling everything the old covenant looked forward to (see Jeremiah 31:31-34). Eating the bread and drinking the cup shows that we are remembering Christ's death for us and renewing our commitment to serve him.
11:25 Jesus said, "Do this, whenever you drink it, in remembrance of me." How do we remember Christ in the Lord's Supper? By thinking about what he did and why he did it. If the Lord's Supper becomes just a ritual or a pious habit, it no longer remembers Christ, and it loses its significance.