John Chrysostom
See verse 6. Then, so that they would not think the healing came from the earth, He commanded him to wash. But why did He not do this there at once, but sent him to Siloam? So that you might see the faith of the blind man, and so that the unbelief of the Jews might be left without excuse.
Naturally, everyone saw him as he went with his eyes anointed with clay. By such an unusual sight, he could not fail to draw the eyes of all, acquaintances and strangers alike. Certainly everyone looked at him attentively.
Since it was not easy to accept that a blind man had received sight, Christ prepared many witnesses in advance by the length of the road, and attentive spectators by the unusual sight. After observing him closely, they could no longer say, "This is he," or, "This is not he."
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Moreover, by sending him to Siloam, He wished to show that He is not alien to the Law and the Old Testament. Finally, there was no danger that the glory would be attributed to Siloam. Many had often washed their eyes in it, but had experienced nothing of the kind.
No, even here it was the power of Christ that acted, accomplishing all things. For this reason the Evangelist adds the interpretation for us. Having said, "to Siloam," he added, "which is translated, Sent," so that you may know that here too Christ healed him. As Paul says, "They drank from the spiritual Rock that followed them, and the Rock was Christ" (1 Cor 10:4).
Therefore, just as Christ was the spiritual Rock, so He was also the spiritual Siloam. It seems to me that the sudden appearance of the water also indicates to us an incomprehensible mystery. Which one? The sudden and unexpected appearing of Christ.
But notice the soul of the blind man, obedient in all things. He did not say: "If clay or spittle can give sight, what need have I of Siloam? And if Siloam is necessary, why the clay? Why did He anoint my eyes? Why did He command me to wash?"
No, he thought nothing of the kind. He cared only to obey the One Who commanded in everything, and he was not scandalized by anything that took place.
If someone asks, "How did he receive sight after washing off the clay?" he will hear nothing from us except that we do not know how it happened. And what is astonishing if we do not know? Neither the Evangelist nor the healed man himself knew this.
He knew only what had happened, but could not understand how. When they questioned him about it, he said, "He put clay on my eyes, and I washed, and I see" (v. 15). But how it happened he could not say, even if they asked him a thousand times.