Ephesians 4:18

Being darkened in understanding, alienated from the life of God by ignorance being in them, by the hardness of their heart;

Ephesians 2:12

That ye were in that time without Christy alienated from the citizenship of Israel, and foreigners from the covenants of solemn promise, having no hope, and without God in the world:

Galatians 4:8

But then truly, not having known God, ye were in a servile condition to them not being gods by nature.

1 Thessalonians 4:5

Not in the passion of eager desire, as also the nations not knowing God:

Acts 17:30

Therefore truly, God having overlooked the times of ignorance, now announces to all men everywhere to repent:

Romans 1:21-23

Wherefore having known God, not as God did they honour or return thanks; but were rendered vain in their conversations, and their heart without understanding was darkened.

Romans 11:25

For I will not ye should not know, brethren, this mystery, lest ye be wise with yourselves; for hardness from part has been to Israel, till the filling up of the nations come in.

Psalm 74:20

Look to thy covenant: for the dark places of the earth were filled with habitations of violence.

Psalm 115:4-8

Their images are silver and gold, the work of man's hands.

Isaiah 44:18-20

They will not know, and they will not discern: he spread over their eyes from seeing; their heart from considering.

Isaiah 46:5-8

To whom will ye liken me and make equal? and compare me and we shall be like?

Daniel 5:20

And when his heart was lifted up, and his spirit was strong for pride, he was brought down from the throne of his kingdom, and they took away his honor from him.

Matthew 13:15

For the heart of this people has been thickened, and with their ears have they heard heavily, and their eyes have they closed; lest perhaps they should see with the eyes, and hear with the ears, and understand with the heart, and turn back, and I should heal them.

Mark 3:5

And having looked round upon them with anger, grieved for the hardness of their heart, he says to the man, Stretch out thy hand. And he stretched out: and his hand was restored whole as the other.

John 12:40

He has blinded their eyes, and hardened their heart: lest they see with the eyes, and understand with the heart, and should turn back, and I should heal them.

Acts 26:17-18

Taking thee away from people, and nations, to whom I now send thee.

Romans 1:28

And as they chose not to have God in knowledge, God delivered them to an adulterated purpose, to do things not fitting;

Romans 2:19

And art persuaded thou thyself to be a guide of the blind, a light of them in darkness,

Romans 8:7-8

Wherefore the thought of the flesh enmity to God: for it is not subject to the law of God, for it cannot be.

1 Corinthians 1:21

For since in the wisdom of God the world by wisdom knew not God, God was contented by the foolishness of proclaiming to save them believing.

2 Corinthians 3:14

But their minds were hardened: for until this day the same veil upon the reading of the old covenant. remains not uncovered;for in Christ it is left unemployed.

2 Corinthians 4:4

In whom the God of this world blinded the minds of the unbelieving, so that the enlightening of the good news of the glory of Christ, who is the image of God, does not enlighten them.

Colossians 1:21

And you, once being alienated and enemies in mind by evil works, and now has he reconciled

James 4:4

Adulterers and adulteresses, know ye not that the friendship of the world is the enmity of God? whoever therefore would wish to be the friend of the world is set the enemy of God.

1 John 2:11

And he hating his brother is in darkness, and walks about in darkness, and knows not where he goes forward, for darkness has blinded his eyes.

Treasury of Scripture Knowledge

Summary

Having the understanding darkened, being alienated from the life of God through the ignorance that is in them, because of the blindness of their heart:

General references

Bible References

The understanding

Psalm 74:20
Look to thy covenant: for the dark places of the earth were filled with habitations of violence.
Psalm 115:4
Their images are silver and gold, the work of man's hands.
Isaiah 44:18
They will not know, and they will not discern: he spread over their eyes from seeing; their heart from considering.
Isaiah 46:5
To whom will ye liken me and make equal? and compare me and we shall be like?
Acts 17:30
Therefore truly, God having overlooked the times of ignorance, now announces to all men everywhere to repent:
Acts 26:17
Taking thee away from people, and nations, to whom I now send thee.
Romans 1:21
Wherefore having known God, not as God did they honour or return thanks; but were rendered vain in their conversations, and their heart without understanding was darkened.
1 Corinthians 1:21
For since in the wisdom of God the world by wisdom knew not God, God was contented by the foolishness of proclaiming to save them believing.
2 Corinthians 4:4
In whom the God of this world blinded the minds of the unbelieving, so that the enlightening of the good news of the glory of Christ, who is the image of God, does not enlighten them.
Galatians 4:8
But then truly, not having known God, ye were in a servile condition to them not being gods by nature.
1 Thessalonians 4:5
Not in the passion of eager desire, as also the nations not knowing God:

Alienated

Ephesians 2:12
That ye were in that time without Christy alienated from the citizenship of Israel, and foreigners from the covenants of solemn promise, having no hope, and without God in the world:
Romans 8:7
Wherefore the thought of the flesh enmity to God: for it is not subject to the law of God, for it cannot be.
Galatians 4:8
But then truly, not having known God, ye were in a servile condition to them not being gods by nature.
Colossians 1:21
And you, once being alienated and enemies in mind by evil works, and now has he reconciled
1 Thessalonians 4:5
Not in the passion of eager desire, as also the nations not knowing God:
James 4:4
Adulterers and adulteresses, know ye not that the friendship of the world is the enmity of God? whoever therefore would wish to be the friend of the world is set the enemy of God.

Because

Romans 1:21
Wherefore having known God, not as God did they honour or return thanks; but were rendered vain in their conversations, and their heart without understanding was darkened.
Romans 2:19
And art persuaded thou thyself to be a guide of the blind, a light of them in darkness,
1 John 2:11
And he hating his brother is in darkness, and walks about in darkness, and knows not where he goes forward, for darkness has blinded his eyes.

General references

Leviticus 11:16
And the daughter of the ostrich, and the night-hawk, and the seagull, and the hawk according to its kind;
Deuteronomy 29:4
And Jehovah gave not to you an heart to know, and eyes to see, and ears to hear, even to this day.