Let's dive in the deep with Fr. Georges Farah...First, the man was born blind. Blindness means literally the inability to see but it also means the inability to recognize or perceive what is around me. Animals in general are born with little sense of recognition. The very young sheep follow their mothers in the herd wherever they go so that they do not get lost. On the contrary, human babies do not recognize their mothers - The little baby gets attached to the woman who feeds him. Surrogate mothers may be able to provide the function of feeding babies, yet the care of the mother for her baby is more than providing food. Parents must nourish their children not to be fearful, not to stay in the "cave of Plato" but to listen to their parents and the Church. You need to listen and slowly work out the discernment of what is good and what is evil through guidance by those wise men of experience in the Church community. Blindness is found in ancient Greek writings such as Sophocles' legend of Oedipus who, after learning that he had killed his father and married his own mother, decided to blind himself. While I am still in the darkness, I must first listen and slowly feel my way out of the cave, for if the light is too bright I may be scared and go back to my comfort zone. Guided togetherness is important in stepping out from my darkness to the light.
Second, How did Jesus heal the man born blind? If you read Genesis, you notice that God formed man from the clay of the ground and breathed life in him (Gen 2: 7). In a similar way, Jesus spat in the ground and made clay of the spittle and anointed the man's eyes with the clay. In a way, this was a spiritual birth for the man - the second birth. This is why in the Sacrament of Baptism, considered the second birth by the Church, the priest who baptizes the baby makes a little spittle mixed with water and signs the child with it on his forehead, his chest and his feet. The power of the Holy Spirit infuses life of the Spirit in the child.
Third [And his disciples asked him, "Rabbi, who sinned, this man or his parents, that he was born blind?" Jesus answered, "It was not that this man sinned, or his parents, but that the works of God might be made manifest in him."] Jesus corrects deep feelings and misunderstandings about God. The Jews thought, as we also do when we have a catastrophe, that suffering or sickness is the lot of those who anger God! We pay for our sins. But that is not the God that Jesus preaches. This is not the father who looks out for his lost son (Luke 15).
Fourth, it was a sabbath day when Jesus made the clay and opened his eyes. The Pharisees again asked him how he had received his sight. And he said to them, "He put clay on my eyes, and I washed, and I see."
Some of the Pharisees said, "This man is not from God, for he does not keep the sabbath." But others said, "How can a man who is a sinner do such signs?" There was a division among them. They asked him again. The man answered, "Why, this is a marvel! You do not know where he comes from, and yet he opened my eyes. We know that God does not listen to sinners, but if any one is a worshiper of God and does his will, God listens to him. Never since the world began has it been heard that any one opened the eyes of a man born blind. If this man were not from God, he could do nothing." The man whose eyes were opened understood by common sense that this was the work of God. He did not need to be a theologian but only follow what he sees and senses. This man made an adventure by opposing the authorities of his time in spite of being condemned by them because he was then sent as a missionary for Christ.