Isaiah 44:18

They do not know, nor do they understand, for He has smeared over their eyes so that they cannot see and their hearts so that they cannot comprehend.

Psalm 81:12

“So I gave them over to the stubbornness of their heart,
To walk in their own devices.

Isaiah 29:10

For the Lord has poured over you a spirit of deep sleep,
He has shut your eyes, the prophets;
And He has covered your heads, the seers.

Jeremiah 10:8

But they are altogether stupid and foolish
In their discipline of delusion—their idol is wood!

Jeremiah 10:14

Every man is stupid, devoid of knowledge;
Every goldsmith is put to shame by his idols;
For his molten images are deceitful,
And there is no breath in them.

Psalm 92:6

A senseless man has no knowledge,
Nor does a stupid man understand this:

Proverbs 2:5-9

Then you will discern the fear of the Lord
And discover the knowledge of God.

Proverbs 28:5

Evil men do not understand justice,
But those who seek the Lord understand all things.

Isaiah 1:3

“An ox knows its owner,
And a donkey its master’s manger,
But Israel does not know,
My people do not understand.”

Isaiah 6:9-10

He said, “Go, and tell this people:
‘Keep on listening, but do not perceive;
Keep on looking, but do not understand.’

Isaiah 44:9

Those who fashion a graven image are all of them futile, and their precious things are of no profit; even their own witnesses fail to see or know, so that they will be put to shame.

Isaiah 44:20

He feeds on ashes; a deceived heart has turned him aside. And he cannot deliver himself, nor say, “Is there not a lie in my right hand?”

Isaiah 45:20

Gather yourselves and come;
Draw near together, you fugitives of the nations;
They have no knowledge,
Who carry about their wooden idol
And pray to a god who cannot save.

Isaiah 46:7-8

“They lift it upon the shoulder and carry it;
They set it in its place and it stands there.
It does not move from its place.
Though one may cry to it, it cannot answer;
It cannot deliver him from his distress.

Isaiah 56:11

And the dogs are greedy, they are not satisfied.
And they are shepherds who have no understanding;
They have all turned to their own way,
Each one to his unjust gain, to the last one.

Jeremiah 5:21

‘Now hear this, O foolish and senseless people,
Who have eyes but do not see;
Who have ears but do not hear.

Daniel 12:10

Many will be purged, purified and refined, but the wicked will act wickedly; and none of the wicked will understand, but those who have insight will understand.

Hosea 14:9

Whoever is wise, let him understand these things;
Whoever is discerning, let him know them.
For the ways of the Lord are right,
And the righteous will walk in them,
But transgressors will stumble in them.

Matthew 12:34

You brood of vipers, how can you, being evil, speak what is good? For the mouth speaks out of that which fills the heart.

Matthew 13:14-15

In their case the prophecy of Isaiah is being fulfilled, which says,
You will keep on hearing, but will not understand;
You will keep on seeing, but will not perceive;

John 5:44

How can you believe, when you receive glory from one another and you do not seek the glory that is from the one and only God?

John 8:43

Why do you not understand what I am saying? It is because you cannot hear My word.

John 12:39-40

For this reason they could not believe, for Isaiah said again,

Acts 14:16

In the generations gone by He permitted all the nations to go their own ways;

Romans 1:21-23

For even though they knew God, they did not honor Him as God or give thanks, but they became futile in their speculations, and their foolish heart was darkened.

Romans 1:28

And just as they did not see fit to acknowledge God any longer, God gave them over to a depraved mind, to do those things which are not proper,

Romans 11:8-10

just as it is written,
God gave them a spirit of stupor,
Eyes to see not and ears to hear not,
Down to this very day.”

2 Corinthians 4:3-4

And even if our gospel is veiled, it is veiled to those who are perishing,

2 Thessalonians 2:9-12

that is, the one whose coming is in accord with the activity of Satan, with all power and signs and false wonders,

2 Peter 2:14

having eyes full of adultery that never cease from sin, enticing unstable souls, having a heart trained in greed, accursed children;

Treasury of Scripture Knowledge

Bible References

Have not

Isaiah 44:9
Those who fashion a graven image are all of them futile, and their precious things are of no profit; even their own witnesses fail to see or know, so that they will be put to shame.
Isaiah 45:20
Gather yourselves and come;
Draw near together, you fugitives of the nations;
They have no knowledge,
Who carry about their wooden idol
And pray to a god who cannot save.
Isaiah 46:7
“They lift it upon the shoulder and carry it;
They set it in its place and it stands there.
It does not move from its place.
Though one may cry to it, it cannot answer;
It cannot deliver him from his distress.
Jeremiah 10:8
But they are altogether stupid and foolish
In their discipline of delusion—their idol is wood!
Romans 1:21
For even though they knew God, they did not honor Him as God or give thanks, but they became futile in their speculations, and their foolish heart was darkened.

For he hath

Isaiah 6:10
Render the hearts of this people insensitive,
Their ears dull,
And their eyes dim,
Otherwise they might see with their eyes,
Hear with their ears,
Understand with their hearts,
And return and be healed.”
Isaiah 29:10
For the Lord has poured over you a spirit of deep sleep,
He has shut your eyes, the prophets;
And He has covered your heads, the seers.
Psalm 81:12
“So I gave them over to the stubbornness of their heart,
To walk in their own devices.
Matthew 13:14
In their case the prophecy of Isaiah is being fulfilled, which says,
You will keep on hearing, but will not understand;
You will keep on seeing, but will not perceive;
Acts 14:16
In the generations gone by He permitted all the nations to go their own ways;
Romans 1:28
And just as they did not see fit to acknowledge God any longer, God gave them over to a depraved mind, to do those things which are not proper,
Romans 11:8
just as it is written,
God gave them a spirit of stupor,
Eyes to see not and ears to hear not,
Down to this very day.”
2 Corinthians 4:3
And even if our gospel is veiled, it is veiled to those who are perishing,
2 Thessalonians 2:9
that is, the one whose coming is in accord with the activity of Satan, with all power and signs and false wonders,

Cannot

Isaiah 56:11
And the dogs are greedy, they are not satisfied.
And they are shepherds who have no understanding;
They have all turned to their own way,
Each one to his unjust gain, to the last one.
Psalm 92:6
A senseless man has no knowledge,
Nor does a stupid man understand this:
Proverbs 2:5
Then you will discern the fear of the Lord
And discover the knowledge of God.
Proverbs 28:5
Evil men do not understand justice,
But those who seek the Lord understand all things.
Jeremiah 5:21
‘Now hear this, O foolish and senseless people,
Who have eyes but do not see;
Who have ears but do not hear.
Daniel 12:10
Many will be purged, purified and refined, but the wicked will act wickedly; and none of the wicked will understand, but those who have insight will understand.
Hosea 14:9
Whoever is wise, let him understand these things;
Whoever is discerning, let him know them.
For the ways of the Lord are right,
And the righteous will walk in them,
But transgressors will stumble in them.
Matthew 12:34
You brood of vipers, how can you, being evil, speak what is good? For the mouth speaks out of that which fills the heart.
John 5:44
How can you believe, when you receive glory from one another and you do not seek the glory that is from the one and only God?
John 8:43
Why do you not understand what I am saying? It is because you cannot hear My word.
John 12:39
For this reason they could not believe, for Isaiah said again,
2 Peter 2:14
having eyes full of adultery that never cease from sin, enticing unstable souls, having a heart trained in greed, accursed children;

General references

Isaiah 43:8
Bring out the people who are blind, even though they have eyes,
And the deaf, even though they have ears.
Matthew 13:13
Therefore I speak to them in parables; because while seeing they do not see, and while hearing they do not hear, nor do they understand.
Matthew 24:39
and they did not understand until the flood came and took them all away; so will the coming of the Son of Man be.

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