The key to the verses you quoted is to understand if Jesus was speaking figuratively or literally about bread and food. It is clear from the context of the surrounding verses that Jesus was speaking figuratively of spiritual food. Jesus just supplied the crowd with physical bread, but many didn’t have a true belief in Him. They only followed him because He was a miracle worker and not because they were truly devoted to Him as the Son of God.
This is another example of Jesus using a parable or figurative language to express a deeper meaning. Eating or consuming His flesh represents a total trust and belief in Him.
That is why the entire Gospel must be harmonized. Taken in isolation the Gospel of John can be interpreted in several ways, but then the Institution of the Eucharist is addressed in the other Gospels and in the context of the Old Testament covenants, the meaning becomes clear. The Jews too had great difficulty with believing it.
Peace be with you
In the Synoptics at the Last supper discourse Jesus uses the word "Estin" when He says that this "is" His body. Can you show me a single instance of the word being used to mean figurative, or "represents?
Unless you are Bill Clinton is does mean is.