John 12: 35Then Jesus told them, "You are going to have the light just a little while longer. Walk while you have the light, before darkness overtakes you. The man who walks in the dark does not know where he is going.
36Put your trust in the light while you have it, so that you may become sons of light." When he had finished speaking, Jesus left and hid himself from them.
37Even after Jesus had done all these miraculous signs in their presence, they still would not believe in him.
38This was to fulfill the word of Isaiah the prophet: "Lord, who has believed our message and to whom has the arm of the Lord been revealed?"
39For this reason they could not believe, because, as Isaiah says elsewhere:
40"He has blinded their eyes and deadened their hearts, so they can neither see with their eyes, nor understand with their hearts, nor turn--and I would heal them."
41Isaiah said this because he saw Jesus' glory and spoke about him.