NT-GOSPEL.filter - emtv harden:

emtv@Mark:6:52 @ For they had not understood concerning the loaves, because their heart was hardened.

emtv@Mark:8:17 @ But Jesus, knowing about it, said to them, "Why are you reasoning because you have no bread? Do you not yet perceive or understand? Is your heart still hardened?

emtv@John:12:40 @ "He has blinded their eyes and hardened their hearts, lest they should see with their eyes, lest they should understand with their hearts and turn, and I would heal them."