The New John Gill Exposition of the Entire BibleJohn 6:42
And they said, is not this Jesus the son of Joseph?
From murmuring they go to mocking and scoffing at his parentage and
descent, and object this to his coming down from heaven; and intend
by it to upbraid him with the meanness of his birth, being the son
of Joseph, a poor carpenter; and suggest, that it was great
arrogance in him to claim an heavenly original, and to ascribe such
things to himself, that he was the bread of God, and the bread of
life, and came from heaven:
whose father and mother we know?
for Capernaum and Nazareth were not
at a great distance from each other; so that Joseph and Mary might
be personally known by the inhabitants of Capernaum, and they might
be intimately acquainted with them.
How is it then that he saith, I came down from heaven?
not tell how to reconcile these things, not knowing either his
miraculous conception and incarnation, nor his divine sonship;
otherwise his being made of a woman, or born of a virgin on earth,
is consistent with his being the Lord from heaven.