Jamieson, Fausset and Brown on John 9:39-41

39-41. Jesus said--perhaps at the same time, but after a crowd, including some of the skeptical and scornful rulers, had, on seeing Jesus talking with the healed youth, hastened to the spot.

that they which see not might see, &c.--rising to that sight of which the natural vision communicated to the youth was but the symbol. (See on Joh 9:5, and compare Lu 4:18).

that they which see might be made blind--judicially incapable of apprehending and receiving the truth, to which they have wilfully shut their eyes.