Eucharistic theology is a branch of Christian theology which treats doctrines concerning the Holy Eucharist, also commonly known as the Lord's Supper and Holy Communion. The majority of Christian denominations view the Eucharist as a sacrament or ordinance.
In the Gospel accounts of Jesus' earthly ministry, a crowd of listeners challenges him regarding the rain of manna before he delivers the famous Bread of Life Discourse (John 6:22–59), and he describes himself as the "True Bread from Heaven". The aforementioned Bread of Life Discourse occurs in the Gospel of John, John 6:30–59. Therein, Jesus promises to give his flesh and blood, which he states will give eternal life to all who receive it. In John 6:53 (RSV), Jesus says, "Truly, truly, I say to you, unless you eat the flesh of the Son of man and drink his blood, you have no life in you"; in verses 54–55, he continues: "he who eats my flesh and drinks my blood has eternal life, and I will raise him up at the last day. For my flesh is food indeed and my blood is drink indeed."
