For when He sent him to the pool of Siloam to wash, He sent him blind. And when he began to see, he did not see the Savior among the multitude that had gathered around him, but immediately, before he saw the Master, he was called to struggle in the contest. For the Master put clay on his eyes before this, that the following might be fulfilled.
For when they cast him out, Christ found him and said to him: "Do you believe in the Son of God?" For he did not see him as a prophet and struggle, but as the Son of God. He did not recognize His face, but he recognized His voice. "Do you believe," He said, "in the Son of God?"
St. John Chrysostom