John 9:31

they cast him out--judicially, no doubt, as well in fact. The allusion to his being "born in sins" seems a tacit admission of his being blind from birth--the very thing they had been so unwilling to own. But rage and enmity to truth are seldom consistent in their outbreaks. The friends of this excommunicated youth, crowding around him with their sympathy, would probably express surprise that One who could work such a cure should be unable to protect his patient from the persecution it had raised against him, or should possess the power without using it. Nor would it be strange if such thoughts should arise in the youth's own mind. But if they did, it is certain, from what follows, that they made no lodgment there, conscious as he was that "whereas he was blind, now he saw," and satisfied that if his Benefactor "were not of God, He could do nothing" (Joh 9:33). There was a word for him too, which, if whispered in his ear from the oracles of God, would seem expressly designed to describe his case, and prepare him for the coming interview with his gracious Friend. "Hear the word of the Lord, ye that tremble at His word. Your brethren that hated you, that cast you out for My name's sake, said, Let the Lord be glorified; BUT HE SHALL APPEAR TO YOUR JOY, and they shall be ashamed" (Isa 66:5).

— Jamieson-Fausset-Brown Commentary (public domain)