37. Even though He had done so many miracles before them (right before their eyes), yet they still did not trust in Him and failed to believe in Him–
38. So that what Isaiah the prophet said was fulfilled: Lord, who has believed our report and our message? And to whom has the arm (the power) of the Lord been shown (unveiled and revealed)? [Isa. 53:1.]
39. Therefore they could not believe [they were unable to believe]. For Isaiah has also said,
40. He has blinded their eyes and hardened and benumbed their [callous, degenerated] hearts [He has made their minds dull], to keep them from seeing with their eyes and understanding with their hearts and minds and repenting and turning to Me to heal them.
41. Isaiah said this because he saw His glory and spoke of Him. [Isa. 6:9, 10.]