Jesus answered,
Neither has this man sinned, nor his parents: but that the works of God should be made manifest in him.
All Commentaries on John 9:3 Go To John 9
Cornelius a Lapide
AD 1637
Jesus answered, &c. Christ denies not that he and his parents had sinned both by original and actual sin. But He denies that he was condemned to blindness for these sins, beyond other people, who had committed the same and even greater sins. So S. Augustine. In vain therefore do the Pelagians misuse this passage to do away with original sin.
The reason why God inflicted blindness on this man was that the miraculous power of Christ should be made manifest in his case, and thus Christ be acknowledged as the true Messiah. So the Fathers quoted above. The Gloss gives the mystical meaning, that it was to signify what Christ would do in enlightening mankind in like manner by His grace, and the doctrine of the Gospel. And accordingly the man himself was enlightened not only in his body, but in his mind, as will be seen below. And therefore he suffered no wrong, but gained a benefit by his blindness (says S. Chrysostom), for in consequence of it he beheld with the eyes of his mind, Him who from nothing brought him into being, and received from Him enlightenment both in body and in mind.