How is that "clearly"? Christ says repeatedly in that passage that His flesh is "food indeed".
Do you believe that anyone/everyone who recieves the RC Eucharist HAS eternal life?
Yes. Anyone who receives the Holy Communion worthily (cf 1 Cor 11:29) is reconciled to Christ and is ready to die and be justified. He may fall off later, due to a commission of sin, but until such time he is assured of life everlasting in heaven.
The "literal" meaning indicates they HAVE, are in possesion of Eternal Life
And they are. Your eternal life began at your conception.
clearly, eating and drinking is a metaphor for believing. How is that "clearly"? Christ says repeatedly in that passage that His flesh is "food indeed".
Do you also believe that Jesus is a literal Lamb as observed by John the Baptist?
Is Jesus going to give literal "living water" to the samaritan women at the well and she must literally drink it?
Is Jesus a literal Vine, a Gate, a Lion, a phycisian?
Is Jesus a literal shepherd of literal sheep?
Will Jesus be drinking his own blook in heaven or clearly wine as he says?
Matt 26;27Then he took the cup, gave thanks and offered it to them, saying, "Drink from it, all of you. 28This is my blood of the covenant, which is poured out for many for the forgiveness of sins. 29I tell you, I will not drink of this fruit of the vine from now on until that day when I drink it anew with you in my Father's kingdom."
Clear explanations were only given to the twelve and metaphors were not explained to outsiders, like in John 6.
Mark 4:10When he was alone, the Twelve and the others around him asked him about the parables. 11He told them, "The secret of the kingdom of God has been given to you. But to those on the outside everything is said in parables 12so that, " 'they may be ever seeing but never perceiving, and ever hearing but never understanding; otherwise they might turn and be forgiven!"
Matt 13:34Jesus spoke all these things to the crowd in parables; he did not say anything to them without using a parable.