Congenital blindness is untreatable (v.32). In the opening verses of John 9, the disciples don’t question if the man born blind can be healed by Jesus because they assume a congenital defect is beyond a miracle. Instead, they use the man’s predicament as an opportunity for Jesus to clarify a debated question. “Who sinned to cause this blindness,” they ask, “the man or his parents?”

We have an innate desire to connect cause with effect. But from Jesus’ reply we learn that causation is not as important as purpose. Jesus answers that neither the parents nor the man sinned—the blindness existed so that the wondrous signs of God could be displayed.

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