What does John 9:24-29 mean?

24 Then again called they the man that was blind, and said unto him, Give God the praise: we know that this man is a sinner. 25 He answered and said, Whether he be a sinner or no, I know not: one thing I know, that, whereas I was blind, now I see. 26 Then said they to him again, What did he to thee? how opened he thine eyes? 27 He answered them, I have told you already, and ye did not hear: wherefore would ye hear it again? will ye also be his disciples? 28 Then they reviled him, and said, Thou art his disciple; but we are Moses’ disciples. 29 We know that God spake unto Moses: as for this fellow, we know not from whence he is. (John 9:24-29 KJV)

William Burkitt’s Commentary

Here we have an account of the Pharisees farther practising upon this blind man, to rob Christ of the glory of this miracle; first, they insinuate with him, and then they frown upon him.

First, they insinuate with him, saying, give God, the praise. As if they had said, “Ascribe the cure to God, not to this man,” whom they conclude to be a sinner, because he broke (as they thought) the sabbath. It is no new thing to see men pretend to aim at the glory of God, when at the same time they are maliciously opposing Christ and persecuting his members.

Next, they attempted to frown this poor man into a denial of this miracle wrought upon him, or to persuade the people that it was a cheat: but it is wonderful to observe, how the boldness and confidence of this poor man increased, God giving him that wisdom and courage which all his adversaries were not able to resist or gainstay. Therefore the Pharisees being angry at this boldness of the man, they revile him for being so silly, as to become a disciple to Christ, whose office and authority they knew not; whereas they were the disciples of Moses, whom they knew God spake unto.

Learn hence, That such as are led by malice, and prepossessed with prejudice against Christ, will not only think basely of his person, but refuse to see the clearest evidences of his authority and commission. As for this fellow, say the malicious Pharisees, we know not whence he is, or who gave him this commission.