Hosea 4:6
My people are destroyed for lack of knowledge. Because you have rejected knowledge, I will also reject you as My priests. Since you have forgotten the law of your God, I will also forget your children.

Romans 1:21-22
For although they knew God, they neither glorified Him as God nor gave thanks to Him, but they became futile in their thinking and darkened in their foolish hearts. / Although they claimed to be wise, they became fools,

Proverbs 1:7
The fear of the LORD is the beginning of knowledge, but fools despise wisdom and discipline.

1 Corinthians 2:14
The natural man does not accept the things that come from the Spirit of God. For they are foolishness to him, and he cannot understand them, because they are spiritually discerned.

Jeremiah 4:22
“For My people are fools; they have not known Me. They are foolish children, without understanding. They are skilled in doing evil, but they know not how to do good.”

Ephesians 4:18
They are darkened in their understanding and alienated from the life of God because of the ignorance that is in them due to the hardness of their hearts.

Proverbs 14:6
A mocker seeks wisdom and finds none, but knowledge comes easily to the discerning.

1 Timothy 6:20-21
O Timothy, guard what has been entrusted to you. Avoid irreverent, empty chatter and the opposing arguments of so-called “knowledge,” / which some have professed and thus swerved away from the faith. Grace be with you all.

Isaiah 44:18-20
They do not comprehend or discern, for He has shut their eyes so they cannot see and closed their minds so they cannot understand. / And no one considers in his heart, no one has the knowledge or insight to say, “I burned half of it in the fire, and I baked bread on its coals; I roasted meat and I ate. Shall I make something detestable with the rest of it? Shall I bow down to a block of wood?” / He feeds on ashes. His deluded heart has led him astray, and he cannot deliver himself or say, “Is not this thing in my right hand a lie?”

Matthew 13:14-15
In them the prophecy of Isaiah is fulfilled: ‘You will be ever hearing but never understanding; you will be ever seeing but never perceiving. / For this people’s heart has grown callous; they hardly hear with their ears, and they have closed their eyes. Otherwise they might see with their eyes, hear with their ears, understand with their hearts, and turn, and I would heal them.’

John 8:43-47
Why do you not understand what I am saying? It is because you are unable to accept My message. / You belong to your father, the devil, and you want to carry out his desires. He was a murderer from the beginning, refusing to uphold the truth, because there is no truth in him. When he lies, he speaks his native language, because he is a liar and the father of lies. / But because I speak the truth, you do not believe Me! ...

Proverbs 2:1-5
My son, if you accept my words and hide my commandments within you, / if you incline your ear to wisdom and direct your heart to understanding, / if you truly call out to insight and lift your voice to understanding, ...

2 Thessalonians 2:10-12
and with every wicked deception directed against those who are perishing, because they refused the love of the truth that would have saved them. / For this reason God will send them a powerful delusion so that they believe the lie, / in order that judgment may come upon all who have disbelieved the truth and delighted in wickedness.

Isaiah 6:9-10
And He replied: “Go and tell this people, ‘Be ever hearing, but never understanding; be ever seeing, but never perceiving.’ / Make the hearts of this people calloused; deafen their ears and close their eyes. Otherwise they might see with their eyes, hear with their ears, understand with their hearts, and turn and be healed.”

1 Corinthians 1:18-21
For the message of the cross is foolishness to those who are perishing, but to us who are being saved it is the power of God. / For it is written: “I will destroy the wisdom of the wise; the intelligence of the intelligent I will frustrate.” / Where is the wise man? Where is the scribe? Where is the philosopher of this age? Has not God made foolish the wisdom of the world? ...