No.1 Jesus instituted the Lord’s supper for Christians to do in memory of him:
And [Jesus] took bread, and when he had given thanks, he broke it and gave it to them, saying, “This is my body, which is given for you. Do this in remembrance of me.” {20} And likewise the cup after they had eaten, saying, “This cup that is poured out for you is the new covenant in my blood. [Luke 22:19-20]
…the Lord Jesus on the night when he was betrayed took bread, {24} and when he had given thanks, he broke it, and said, “This is my body which is foryou. Do this in remembrance of me.” {25} In the same way also he took the cup, after supper, saying, “This cup is the new covenant in my blood. Do this, as often as you drink it, in remembrance of me.” [1 Cor. 11:23-25]
The Lord’s supper is done both to help Christians remember what Jesus has done, and also to proclaim what Jesus has done (‘For as often as you eat this bread and drink the cup, you proclaim the Lord’s death until he comes’: 1 Cor. 11:26).
Notes
1. The theological idea for the notion that Jesus is actually present in the bread and the wine at the Lord’s supper is sometimes called “the real presence” of Jesus Christ. The idea that the bread and wine literally turns into Jesus’ body and blood is sometimes called “transubstantiation”.