Where is the Eucharist in the Bible?

The Eucharist is clearly taught in Jesus' Bread of Life discourse, His words at the Last Supper, and St. Paul's letters. These passages reveal the Eucharist as Christ's true Body and Blood, the memorial of His sacrifice, and the sacrament of communion with Him.

Jesus promises His flesh and blood. In John 6, Jesus identifies Himself as the living bread from heaven and says, "The bread that I will give is my flesh for the life of the world" (Jn 6:51). He then declares that unless people eat the flesh of the Son of Man and drink His blood, they have no life in them (Jn 6:53-56). Many disciples find this teaching hard and leave Him, but Jesus does not withdraw or reduce His words to a mere symbol (Jn 6:60-66). The Church has always read this discourse in light of the Eucharist.

Jesus institutes the sacrament. At the Last Supper, Jesus takes bread and says, "This is my body." Over the cup He says, "This is my blood of the covenant," and commands the apostles to continue this memorial (Mt 26:26-28; Lk 22:19-20). He gives sacramentally the same Body and Blood that He offers on the Cross. The Eucharist makes His one sacrifice present without repeating it (CCC 1337-1341, 1362-1367).

St. Paul teaches the Real Presence. Paul asks whether the cup and bread are a participation in Christ's Blood and Body (1 Cor 10:16-17). He also warns that anyone who receives unworthily is guilty of profaning the Body and Blood of the Lord and must discern the body before receiving (1 Cor 11:27-29). Such language would make little sense if Communion were only ordinary bread and wine used as reminders. After consecration, Christ is truly, really, and substantially present under the appearances of bread and wine (CCC 1374-1376).

The Old Testament prepares for it. The manna in the wilderness, the Passover lamb, and the bread and wine offered by Melchizedek foreshadow the Eucharist (Ex 12:1-14; Ex 16:4-15; Gen 14:18). Jesus fulfills these signs. He is the true bread from heaven and the Lamb of God whose sacrifice delivers His people.

The early Church celebrates it. The first Christians devoted themselves to the apostles' teaching, fellowship, prayers, and the breaking of bread (Acts 2:42). Read these passages together, then attend Mass and listen closely to the words of consecration. If you are Catholic and properly disposed, receive with faith, reverence, and gratitude.