What does John 9:13-16 mean?

13 They brought to the Pharisees him that aforetime was blind. 14 And it was the sabbath day when Jesus made the clay, and opened his eyes. 15 Then again the Pharisees also asked him how he had received his sight. He said unto them, He put clay upon mine eyes, and I washed, and do see. 16 Therefore said some of the Pharisees, This man is not of God, because he keepeth not the sabbath day. Others said, How can a man that is a sinner do such miracles? And there was a division among them. (John 9:13-16 KJV)

William Burkitt’s Commentary

Observe here, 1. How the Jews, who should have been full of silent wonder, and inclined to believed in Jesus Christ, so omnipotent an agent, are prejudiced against him, and bring the late blind man before the Pharisees, our Saviour’s professed enemies,

Observe, 2. The time which our Saviour chose for working this cure, it was on the sabbath? Many, if not most of Christ’s famous miracles, were wrought upon the sabbath day. Upon that day he cured the withered hand, Mt 12:13 Upon that day he cured the impotent man at the pool of Bethesda, Joh 5:9 Upon that day he cured the blind man here. This Christ did probably, for two reasons:

1. To confirm his doctrine which he preached on that day, by miracles: therefore his preaching and working miracles went together.

2. To instruct the Jews (had they been willing to receive instruction) in the true doctrine, and proper duties of their sabbath; and to let them know, that works of necessity and mercy are very consistent with the due sanctification of the sabbath. It is hard to find out any time wherein charity is unseasonable; for as it is the best of graces, so the works of it are fittest for the best of days.