John 12:36-40

While you have the Light, believe in the Light, so that you may become sons of Light.” These things Jesus proclaimed, and He went away and hid Himself from them.

But though He had performed so many signs in their sight, they still were not believing in Him.

This happened so that the word of Isaiah the prophet which he spoke would be fulfilled: “Lord, who has believed our report? And to whom has the arm of the Lord been revealed?”

For this reason they could not believe, for Isaiah said again,

“He has blinded their eyes and He hardened their heart, so that they will not see with their eyes and understand with their heart, and be converted, and so I will not heal them.”