Acts 28:26
when he said, Go and tell this people, 'You will hear and hear but never understand, you will see and see but never perceive.'
Matthew 13:14-15
In their case the prophecy of Isaiah is being fulfilled: You will hear and hear but never understand, you will see and see but never perceive.
Mark 4:12
so that for all their seeing they may not perceive, and for all their hearing they may not understand, lest they turn and be forgiven."
Luke 8:10
so he said, "It is granted you to understand the open secrets of the Reign of God, but the others get it in parables, so that for all their seeing they may not see, and for all their hearing they may not understand.
Mark 8:17-18
He noted this and said to them, "Why do you argue you have no bread? Do you not see, do you not understand, even yet? Are you still dull of heart?
Luke 24:25
He said to them, "O foolish men, with hearts so slow to believe, after all the prophets have declared!
Luke 24:45
Then he opened their minds to understand the scriptures.
2 Corinthians 4:4-6
there the god of this world has blinded the minds of unbelievers, to prevent them seeing the light thrown by the gospel of the glory of Christ, who is the likeness of God.