Jesus commands us to together partake of the bread and the cup in remembrance of Him, and so that is why we celebrate Lord’s Supper. We see this in a few different passages (Matt. 26:26-29; Mk. 14:22-25; Lk. 22:17-20; 1 Cor. 11:23-25).
We partake together and first remember Jesus’ propitiatory death for us and so the Lord’s supper causes us to reflect on the past. Second, the Lord’s Supper causes us to reflect on the current fellowship we together experience through union with Christ. And third, we look ahead to the future when we shall feast with Jesus after His return (we “proclaim the Lord’s death until he comes,” 1 Cor. 11:26). Scripture also points us to the importance of self-examination so that we do not take the Lord’s Supper in an unworthy manner and thus bring condemnation upon ourselves (1 Cor. 11:28ff).
The New City Catechism says, “Christ commanded all Christians to eat bread and to drink from the cup in thankful remembrance of him and his death. The Lord’s Supper is a celebration of the presence of God in our midst; bringing us into communion with God and with one another; feeding and nourishing our souls. It also anticipates the day when we will eat and drink with Christ in his Father’s kingdom” (Q46).
The Lord’s Supper is a beautiful and amazing picture of the gospel for us. Jesus’ body was broken and His life was poured out so that we could have life. When we partake of the Lord’s Supper we are reminded of the amazing truth that Jesus—God in flesh—is the Lamb of God that takes away our sin. The Holy Spirit uses the God-ordained and Christ instituted means of the Lord’s Supper to help us remember with thankfulness Christ’s finished work on the cross.