Matthew 13:13-15

That’s why I teach the people using parables, because they think they’re looking for truth, yet because their hearts are unteachable, they never discover it. Although they will listen to me, they never fully perceive the message I speak. The prophecy of Isaiah describes them perfectly: Although they listen carefully to everything I speak, they don’t understand a thing I say. They look and pretend to see, but the eyes of their hearts are closed. Their minds are dull and slow to perceive, their ears are plugged and are hard of hearing, and they have deliberately shut their eyes to the truth. Otherwise they would open their eyes to see, and open their ears to hear, and open their minds to understand. Then they would turn to me and I would instantly heal them.