Matthew 12:34
O vipers' brood, how can you speak what is good when you are evil? For it is from the overflow of the heart that the mouth speaks.
Matthew 13:14-15
And in regard to them the prophecy of Isaiah is receiving signal fulfilment: "'You will hear and hear and by no means understand, and you will look and look and by no means see.
John 5:44
How is it possible for you to believe, while you receive glory from one another and have no desire for the glory that comes from the only God?
John 8:43
How is it you do not understand me when I speak? It is because you cannot bear to listen to my words.
John 12:39-40
For this reason they were unable to believe--because Isaiah said again,
Acts 14:16
In times gone by He allowed all the nations to go their own ways;
Romans 1:21-23
For when they had come to know God, they did not give Him glory as God nor render Him thanks, but they became absorbed in useless discussions, and their senseless minds were darkened.
Romans 1:28
And just as they had refused to continue to have a full knowledge of God, so it was to utterly worthless minds that God gave them up, for them to do things which should not be done.
Romans 11:8-10
And so Scripture says, "God has given them a spirit of drowsiness--eyes to see nothing with and ears to hear nothing with--even until now."
2 Corinthians 4:3-4
If, however, the meaning of our Good News has been veiled, the veil has been on the hearts of those who are on the way to perdition,
2 Thessalonians 2:9-12
The appearing of the Lawless one will be attended by various miracles and tokens and delusive marvels--for so Satan works--
2 Peter 2:14
Their very eyes are full of adultery--being eyes which never cease from sin. These men set traps to catch unstedfast souls, their own hearts being well trained in greed. They are fore-doomed to God's curse!