John 8:27
But they did not understand that he spoke to them of the Father.
Isaiah 6:9
Then he said, Go and tell this people, Hear indeed, but do not understand; and see 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, and as if we had no eyes we walk by touch; we stumble at noonday as in the night; we are in graves as dead men.
John 8:43
Why do ye not understand my speech? even because ye cannot hear my word.
John 8:47
He that is of God hears God's words; ye therefore hear them not because ye are not of God.
Romans 11:7-10
What then? Israel has not obtained that which he seeks after; but the elect have obtained it, and the rest were blinded
2 Corinthians 4:3-4
But if our gospel is hid, it is hid to those that are lost,