John 12:37-41

Even after Jesus had performed so many signs in their presence, they still would not believe in him. This was to fulfil the word of Isaiah the prophet: ‘Lord, who has believed our message and to whom has the arm of the Lord been revealed?’ For this reason they could not believe, because, as Isaiah says elsewhere: ‘He has blinded their eyes and hardened their hearts, so they can neither see with their eyes, nor understand with their hearts, nor turn – and I would heal them.’ Isaiah said this because he saw Jesus’ glory and spoke about him.