Matthew 13:13-14
Therefore I speak to them in parables: that seeing, they may not see; and hearing, they may not hear nor understand.
Mark 4:12
That seeing they may see, yet not perceive; and hearing may hear, yet not understand; lest at any time they should be converted, and their sins be forgiven them.
Luke 8:10
And he said, To you it is given to know the mysteries of the kingdom of God; but to the rest in parables: that seeing they may not perceive, and hearing may not comprehend.
John 9:39-41
And Jesus said, For judgment I am come into this world, that they who see not may see; and they who see become blind.
John 12:40
"He hath blinded their eyes, and hardened their hearts; lest they should see with their eyes, and understand with the heart, and be converted, and I should heal them."
Mark 8:17-18
And Jesus knowing it said unto them, Why reason ye together, because ye have no loaves? Do ye not yet consider, nor understand? Have ye your heart yet hardened?
Acts 7:51-52
Ye stiff-necked and uncircumcised in heart and in ears, ye do always oppose yourselves against the Holy Ghost: as your fathers, so are ye.
Acts 28:26-27
saying, Go to this people, and say, "In hearing ye shall hear, and shall not understand; and seeing ye shall see, yet in nowise perceive.
Romans 11:7-8
What then is the result? Israel hath not obtained that which it seeketh; but the election hath obtained it, and the rest were blinded,
2 Corinthians 3:14
But their understandings were darkened: for unto this day the same veil in their reading the old testament abideth unremoved; which veil is taken away by Christ.
2 Corinthians 4:3-4
And if now our gospel be hid, it is hid from those who are lost:
Ephesians 4:18
darkened in understanding; alienated from the life of God through the ignorance which is in them; through the blindness of their hearts:
2 Thessalonians 2:10-11
and in every unrighteous delusion among those who perish: in consequence of which things they received not the love of the truth, that they might be saved.