John Chrysostom
Catena Aurea · Johannesevangelium 9
But the Jews did not believe concerning him, that he had been blind, and received his sight, until they called the parents of him that had received his sight. And they asked them, saying, Is this your son, who ye say was born blind? how then doth he now see? His parents answered them and said, We know that this is our son, and that he was born blind: But by what means he now seeth, we know not; or who hath opened his eyes, we know not: he is of age; ask him: he shall speak for himself. These words spake his parents, because they feared the Jews: for the Jews had agreed already, that if any man did confess that he was Christ, he should be put out of the synagogue. Therefore said his parents, He is of age; ask him.
(Hom. lviii. 2) Three things then being asked,—if he were their son, if he had been blind and how he saw,—they acknowledge two of them: His parents answered them and said, We know that this is our son, and that he was born blind. But the third they refuse to speak to: But by what means he now seeth, we know not. The enquiry in this way ends in confirming the truth of the miracle, by making it rest upon the incontrovertible evidence of the confession of the healed person himself; He is of age, they say, ask him; he can speak for himself.