John Chrysostom
Catena Aurea · Johannesevangelium 9
And as Jesus passed by, he saw a man which was blind from his birth. And his disciples asked him, saying, Master, who did sin, this man, or his parents, that he was born blind? Jesus answered, Neither hath this man sinned, nor his parents: but that the works of God should be made manifest in him. I must work the works of him that sent me, while it is day: the night cometh, when no man can work. As long as I am in the world, I am the light of the world. When he had thus spoken, he spat on the ground, and made clay of the spittle, and he anointed the eyes of the blind man with the clay, And said unto him, Go, wash in the pool of Siloam, (which is by interpretation, Sent.) He went his way therefore, and washed, and came seeing.
(Hom. liv. 1. c. 5) They were led to ask this question, by our Lord having said above, on healing the man sick of the palsy, Lo, thou art made whole; sin no more. Thinking from this that the man had been struck with the palsy for his sins, they ask our Lord of the blind man here, whether he did sin, or his parents; neither of which could have been the reason of his blindness; the former, because he had been blind from his birth; the latter, because the son does not suffer for the father.