Summary of passage: The Jews began to grumble, questioning how Jesus who is the son of Joseph, a common carpenter, could be the Son of God.
3) That Jesus’ birth was a miracle from God and that it fulfilled Old Testament prophecy. All the miracles Jesus performed, God’s blessing when Jesus was baptized by John the Baptist.
4) Essential. If you don’t believe Jesus is the Son of God and that he was just a man, then you won’t have eternal life. If Jesus Christ was not virgin born, then He was not God in the flesh and was therefore only a man possessing the same sinful nature that every person has. God put aside His eternal glory to become man. God revealed Himself in Jesus. To not believe in Jesus (and thus his heavenly nature) means you don’t believe in God. Consequences: Damned for eternity.
Conclusions: Shortest and easiest lesson thus far.
End Notes: Six times in this immediate context Jesus says that he ‘came down from heaven’ (6:33, 38, 41, 50, 51, 58). Why would anyone say this if it were not true?
The Jews are probably the Galileans here.