This Sunday is the feast of Corpus Christi, the body and Blood of Christ. There are multiple layers to this feast, each of which reveals an ever deeper and greater mystery. This feast, when all is said and done, concerns the humiliation of the eternal Son of God.
So, we must understand what exactly Jesus is doing here- without trying to level out what is mysterious. Because I must be clear: this is mysterious- the eucharist is truly the body and blood of Christ, it is not an empty sign, it's not just a symbol to remind us WE are the body of Christ.