It’s interesting to read what was actually said
am that bread of life.
Joh 6:49 Your fathers did eat manna in the wilderness, and are dead.
Joh 6:50 This is the bread which cometh down from heaven, that a man may eat thereof, and not die.
Joh 6:51 I am the living bread which came down from heaven: if any man eat of this bread, he shall live for ever: and the bread that I will give is my flesh, which I will give for the life of the world.
Joh 6:52 The Jews therefore strove among themselves, saying, How can this man give us his flesh to eat?
Joh 6:53 Then Jesus said unto them, Verily, verily, I say unto you, Except ye eat the flesh of the Son of man, and drink his blood, ye have no life in you.
Joh 6:54 Whoso eateth my flesh, and drinketh my blood, hath eternal life; and I will raise him up at the last day.
Joh 6:55 For my flesh is meat indeed, and my blood is drink indeed.
Joh 6:56 He that eateth my flesh, and drinketh my blood, dwelleth in me, and I in him.
Joh 6:57 As the living Father hath sent me, and I live by the Father: so he that eateth me, even he shall live by me.
Joh 6:58 This is that bread which came down from heaven: not as your fathers did eat manna, and are dead: he that eateth of this bread shall live for ever.
Joh 6:59 These things said he in the synagogue, as he taught in Capernaum.
As often, He then explained to his disciple what He meant
Joh 6:60 Many therefore of his disciples, when they had heard this, said, This is an hard saying; who can hear it?
Joh 6:61 When Jesus knew in himself that his disciples murmured at it, he said unto them, Doth this offend you?
Joh 6:62 What and if ye shall see the Son of man ascend up where he was before?
Joh 6:63 It is the spirit that quickeneth; the flesh profiteth nothing: the words that I speak unto you, they are spirit, and they are life.
For further clarification
Luk 22:19 And he took bread, and gave thanks, and brake it, and gave unto them, saying, This is my body which is given for you: this do in remembrance of me.
Luk 22:20 Likewise also the cup after supper, saying, This cup is the new testament in my blood, which is shed for you.
Joh 1:14 And the Word was made flesh, and dwelt among us, (and we beheld his glory, the glory as of the only begotten of the Father,) full of grace and truth.
And if you recall, John 6:63 He said the flesh had no value, it was the Word that saved
Paul later speaks as well and doesn’t add any extra mysticism to it.
John says
1Jn 3:24 And he that keepeth his commandments dwelleth in him, and he in him. And hereby we know that he abideth in us, by the Spirit which he hath given us.
I believe that “commandments” could also be interpreted as word.
We don’t need to add some extra meaning past what Jesus and His apostles said. It’s enough that we obey and I personally can accept calling it a “mystery” I believe, like baptism, that something is happening in the spiritual world we don’t understand, but I firmly disagree that we eat blood and flesh.