John 12:38-41

38This was to fulfill the word of Isaiah the prophet, who said: Lord, who has believed our message? And to whom has the arm of the Lord been revealed?

39This is why they were unable to believe, because Isaiah also said:

40He has blinded their eyes and hardened their hearts, so that they would not see with their eyes or understand with their hearts, and turn, and I would heal them.

41Isaiah said these things because he saw his glory and spoke about him.