• Deuteronomy 29:4
  Yet the LORD has not given you a heart to perceive and eyes to see and ears to hear, to this very day.
   
• Matthew 13:10-13
  And the disciples came and said to Him, “Why do You speak to them in parables?” He answered and said to them, "Because it has been given to you to know the mysteries of the kingdom of heaven, but to them it has not been given. For whoever has, to him more will be given, and he will have abundance; but whoever does not have, even what he has will be taken away from him. Therefore I speak to them in parables, because seeing they do not see, and hearing they do not hear, nor do they understand.
   

Related Scriptures

• John 18:37
  Pilate therefore said to Him, 'Are You a king then?' Jesus answered, 'You say rightly that I am a king. For this cause I was born, and for this cause I have come into the world, that I should bear witness to the truth. Everyone who is of the truth hears My voice.'