What does John 6:65 mean?
Jesus commented that "the flesh is no help at all" (John 6:63). This directly indicates that His teaching on "eating" His flesh and blood were symbolic, not literal. At the same time, the remark illustrates the difference between legitimate belief and mere "interest." Many people who followed Jesus at that time had a shallow, selfish interest in His ministry. Throughout this passage, Jesus has challenged their motivations (John 6:26), their understanding of Scripture (John 6:27–29), and what it really means to have faith in the One God has sent (John 6:37–40). Their behaviors in response to these challenges—their "flesh," so to speak—both discourage and disprove their faith.This also speaks to the earlier point made by Jesus that only those God has "given" to Him can be saved (John 6:37). This is related to the controversial doctrine of predestination. Other passages of the Bible speak of concepts such as "choice" and "calling," and so forth. The ideas of predestination and election are not meant to be understood by examining only one or two verses. Here, however, the emphasis is clearly on the fact that only God can call a sinner to repentance. The reaction of the crowd in this story proves this idea in direct terms. Interest and action are not what save us: it is submissive faith in Christ, which is fundamentally something we can only credit to God.
John 6:60–71 shows the drastic impact of Jesus' teaching on the crowd: most walk away. When confronted with spiritual needs and a spiritual message, most people will turn it down. What society wants is spectacle, material things, and a political savior. The more Jesus insists on being the means to eternal life, the angrier the crowd becomes, until the vast majority simply abandon Him. The twelve disciples, on the other hand, seem willing to follow Jesus, though they are also struggling to accept His recent claims. Peter's declaration will be the third of John's seven witnesses to Jesus' divinity.
In chapter 6, Jesus feeds thousands of people who had been following Him. He does this by miraculously dividing the contents of a small meal, leaving more left over than He had to begin with. At first, the crowd is amazed and they enthusiastically praise Jesus. After sending the disciples across the Sea of Galilee and rescuing them from a storm by walking on the water, Jesus once again addresses the crowd. This time, He emphasizes the spiritual lesson behind His prior miracle. In response, most of those who had been praising Jesus turn away in disappointment.