7:27 {11} Howbeit we know this man whence he is: but when Christ cometh, no man knoweth whence he is.
(11) Men are very wise to have checks and balances for their own thoughts.
7:27 Howbeit we know this man whence he is. The Jews had an idea, due probably to Da 7:13, that when the Messiah came no one would know from whence he came.
7:27 When Christ cometh, none knoweth whence he is - This Jewish tradition was true, with regard to his Divine nature: in that respect none could declare his generation. But it was not true with regard to his human nature, for both his family and the place of his birth were plainly foretold.
7:25-30 Christ proclaimed aloud, that they were in error in their thoughts about his origin. He was sent of God, who showed himself true to his promises. This declaration, that they knew not God, with his claim to peculiar knowledge, provoked the hearers; and they sought to take him, but God can tie men's hands, though he does not turn their hearts.
