John 9:39
“For judgment I have come into the world, that they which see not might see, and that they which see might be made blind.”
So also says Paul; “What shall we say then? That the Gentiles which followed not after righteousness have attained to righteousness, even the righteousness which is of the faith of Jesus; but Israel, which followed after the law of righteousness, has not attained to the law of righteousness.” By saying, “For judgment I have come into this world,” He both made the man stronger respecting the faith, and aroused those who followed Him; for the Pharisees were following Him. And the, “For judgment,” He spoke with reference to a greater punishment; showing that they who had given sentence against Him, had received sentence against themselves; that they who had condemned Him as a sinner, were themselves the persons condemned. In this passage He speaks of two recoveries of sight, and two blindnesses; one sensible, the other spiritual.
Source: Homilies on the Gospel of John (New Advent)