John 12:37-41

Even with the overwhelming evidence of all the many signs and wonders that Jesus had performed in front of them, his critics still refused to believe. This fulfilled the prophecy given by Isaiah: Lord, who has believed our message? Who has seen the unveiling of your great power? And the people were not able to believe, for Isaiah also prophesied: God has blinded their eyes and hardened their hearts to the truth. So with their eyes and hearts closed they cannot understand the truth nor turn to me so that I could instantly cleanse and heal them. Isaiah said these things because he had seen and experienced the splendor of Jesus and prophesied about him.