John 12:35-40

35 Jesus said to them, "The light is with you for a little longer. Walk while you have the light, lest the darkness overtake you; he who walks in the darkness does not know where he goes.

36 While you have the light, believe in the light, that you may become sons of light." When Jesus had said this, he departed and hid himself from them.

37 Though he had done so many signs before them, yet they did not believe in him;

38 it was that the word spoken by the prophet Isaiah might be fulfilled: "Lord, who has believed our report, and to whom has the arm of the Lord been revealed?"

39 Therefore they could not believe. For Isaiah again said,

40 "He has blinded their eyes and hardened their heart, lest they should see with their eyes and perceive with their heart, and turn for me to heal them."