John 8:27
They did not understand that he spoke the Father to them.
Isaiah 6:9
And he said, Go, and tell this people, Hear ye indeed, but do not understand, and see ye indeed, but do not perceive.
Isaiah 42:18-20
Hear, ye deaf, and look, ye blind, that ye may see.
Isaiah 59:10
We grope for the wall like the blind. Yea, we grope as those who have no eyes. We stumble at noonday as in the twilight. [We are] as dead men in desolate places.
John 8:43
Why do ye not understand my speech? Because ye cannot hear my word.
John 8:47
He who is of God hears the sayings of God. Because of this ye do not hear, because ye are not of God.
Romans 11:7-10
What then? What Israel seeks, this it did not obtain. But the chosen obtained it, and the rest were hardened,
2 Corinthians 4:3-4
But even if our good-news is concealed, it is concealed in those who are perishing,