"35 Jesus heard that they had cast him out, and having found him he said, “Do you believe in the Son of Man?” 36 He answered, “And who is he, sir, that I may believe in him?” 37 Jesus said to him, “You have seen him, and it is he who is speaking to you.” 38 He said, “Lord, I believe”, and he worshipped him. 39 Jesus said, “For judgement I came into this world, that those who do not see may see, and those who see may become blind.” 40 Some of the Pharisees near him heard these things, and said to him, “Are we also blind?”41 Jesus said to them, “If you were blind, you would have no guilt; but now that you say, ‘We see’, your guilt remains."
John 9:35-41
Two things remain for comment in the chapter. The first is the second encounter the man had with Jesus. There is something very fitting about this meeting as it crowns the man's simple and fearless testimony, and gives an excellent illustration of the words 'to him that hath it shall be given', for the gradual and progressive development of his understanding of what had happened to him and of who it was that had healed him finds its natural climax in the attitude of worship expressed in 36-38. This represents the fruition of the work that had been begun in him when Jesus had first smeared his eyes with the clay. The second point has to do with our Lord's final words in 39 and 41, which underline how dangerous it is to possess knowledge if good use is not made of it. The Pharisees claimed to have knowledge, yet it had never touched their lives, and therefore it became their condemnation. 'Judgment' here refers to discrimination or separation into different classes, and this is certainly what the coming of Christ into that situation had done. Light has a twofold effect: it is torture to diseased eyes, but gladdening to sound ones. And the light that had come into the world in Jesus Christ was absolute torture to these evil men. Their disease was that they claimed to see, nevertheless they refused His testimony. Therefore their sin remained and blindness came upon them. Always, then, there is the strange work of God, the work of judgment, alongside His proper work of redemption and blessing and grace. Light comes to both alike: to the one it is healing, blessing and benediction, to the other judgment and condemnation. And this is the condemnation, that light is come into the world, and men loved darkness rather than light, because their deeds were evil.