Augustine of Hippo
Catena Aurea · Johannesevangelium 9
Jesus heard that they had cast him out; and when he had found him, he said unto him, Dost thou believe on the Son of God? He answered and said, Who is he, Lord, that I might believe on him? And Jesus said unto him, Thou hast both seen him, and it is he that talketh with thee. And he said, Lord, I believe. And he worshipped him. And Jesus said, For judgment I am come into this world, that they which see not might see; and that they which see might be made blind. And some of the Pharisees which were with him heard these words, and said unto him, Are we blind also? Jesus said unto them, If ye were blind, ye should have no sin: but now ye say, We see: therefore your sin remaineth.
(Tr. xliv. 15) First, He washes the face of his heart. Then, his heart’s face being washed, and his conscience cleansed, he acknowledges Him as not only the Son of man, which he believed before, but as the Son of God, Who had taken flesh upon Him: And he said, Lord, I believe. I believe, is a small thing. Wouldest thou see what he believes of Him? And falling down, he worshipped Him. (Vulgate)