In this particular instance, John 6, the scripture records Jesus explaining that He is not speaking in metaphores; St. Paul likewise explain the Eucharist as real presence of Christ in 1 Cor 11:29. At other times the metaphorical character of His speech is clear from the context. If you have specific question about any passage, please ask me, and I will try to give you what the Church teaches as accurately as I can.
The Body of Jesus/Christ(I Cor 11;29) is what?..
1) Flesh?.. 2) Some kind of Humanity?.. 3) an Earthly organization?..
The Body of Christ is a metaphor of "something else"..
The word "church" has been corrupted to mean what it don't mean scripturally..
The Body of Christ implies need for a Head..
The Head and the Body of Christ is metaphorically the Christ.. both together..
If NOT then the metaphor of the body of christ is Stupid..
Mere prose, great swelling words, rhetoric, parsing semantics..