Have you ever bothered to read past verse 53, to see what Jesus said to His disciples regarding the episode with the literalist that had just occurred? Maybe you can get your priest to read it to you ...
57"As the living Father sent Me, and I live because of the Father, so he who eats Me, he also will live because of Me. 58"This is the bread which came down out of heaven; not as the fathers ate and died; he who eats this bread will live forever." 59These things He said in the synagogue as He taught in Capernaum.60Therefore many of His disciples, when they heard this said, "This is a difficult statement; who can listen to it?" 61But Jesus, conscious that His disciples grumbled at this, said to them, "Does this cause you to stumble?â¦
62"What then if you see the Son of Man ascending to where He was before? 63"It is the Spirit who gives life; the flesh profits nothing; the words that I have spoken to you are spirit and are life. 64"But there are some of you who do not believe."