Mark 4:12
that they may surely see, and not perceive; and that they may surely hear, and not understand; lest they should turn to me, and their sins should be forgiven them.
Luke 8:10
He replied: To you it is given to know the mysteries of the kingdom of God: but to others in parables; that when they see, they may not see, and when they hear, they may not understand.
Matthew 13:14-15
And in them is fulfilled the prophesy of Isaiah, which says: You shall surely hear, and you will not understand; and you shall surely see, and you will not perceive.
Romans 11:8
as it is written: God has given them a spirit of stupor, eyes with which they can not see, and ears with which they can not hear.
John 12:40
He has blinded their eyes, and hardened their heart, lest they should see with their eyes, and understand with their heart, and should turn, and I should give them health.
Acts 28:26-27
saying: Go to this people and say, You shall surely hear, but you will not understand; and you shall surely see, but you will not perceive.