“Jesus said to them, ‘I assure you, unless you eat the flesh of the Human One and drink his blood, you have no life in you. Whoever eats my flesh and drinks my blood has eternal life, and I will raise them up at the last day. My flesh is true food and my blood is true drink. Whoever eats my flesh and drinks my blood remains in me and I in them. As the living Father sent me, and I live because of the Father, so whoever eats me lives because of me’” (John 6:53-57, CEB).
I’m not so certain that in these verses Jesus is just talking about taking communion. Certainly, communion celebrates the flesh and blood sacrifice of Jesus through the imagery of the bread and the wine. I suppose these verses might even be used to support the notion that the bread and wine of the Eucharist is somehow changed into the body and blood of Christ.
But I don’t think that’s at all what Jesus had in mind here.