Ephesians 4:18

being darkened in understanding, alienated from the life of God, because of the ignorance [that] is in them, because of the hardness of their heart,

Ephesians 2:12

that you were at that time apart from Christ, alienated from the citizenship of Israel, and strangers to the covenants of promise, not having hope, and without God in the world.

Galatians 4:8

But at that time [when you] did not know God, you were enslaved to the things which by nature are not gods.

1 Thessalonians 4:5

not in lustful passion, just as also the Gentiles who do not know God;

Acts 17:30

Therefore [although] God has overlooked the times of ignorance, he now commands all people everywhere to repent,

Romans 1:21-23

For [although they] knew God, they did not honor [him] as God or give thanks, but they became futile in their reasoning, and their senseless hearts were darkened.

Romans 11:25

For I do not want you to be ignorant, brothers, of this mystery, so that you will not be wise {in your own sight}, that a partial hardening has happened to Israel, until the full number of the Gentiles has come in,

Psalm 74:20

Have regard for the covenant, because [the] dark places of [the] land are full of [the] haunts of violence.

Psalm 115:4-8

Their idols [are] silver and gold, [the] work of human hands.

Isaiah 44:18-20

They do not know, and they do not understand, for their eyes [are] besmeared {so that they cannot see}, their {minds} {so that they have no insight}.

Isaiah 46:5-8

To whom will you liken me, and count as equal, and compare with me, as though we were alike?

Daniel 5:20

But {when} his heart became arrogant and his spirit became hard [so as] to act proudly, he was deposed from the throne of his kingdom and the glory {was taken away from him}.

Matthew 13:15

For the heart of this people has become dull, and with their ears they hear with difficulty, and they have shut their eyes, so that they would not see with their eyes and hear with their ears and understand with their heart and turn, and I would heal them."

Mark 3:5

And looking around at them with anger, grieved at the hardness of their hearts, he said to the man, "Stretch out your hand." And he stretched [it] out, and his hand was restored.

John 12:40

"He has blinded their eyes and hardened their hearts, lest they see with [their] eyes and understand with [their] hearts and turn, and I heal them."

Acts 26:17-18

rescuing you from the people and from the Gentiles to whom I am sending you,

Romans 1:28

And just as they did not see fit {to recognize God}, God gave them over to a debased mind, to do the things [that are] not proper,

Romans 2:19

and are confident [that] you yourself are a guide of the blind, a light of those in darkness,

Romans 8:7-8

because the mindset of the flesh [is] enmity toward God, for [it is] not subjected to the law of God, for [it is] not able [to do so],

1 Corinthians 1:21

For since, in the wisdom of God, the world through its wisdom did not know God, God was pleased through the foolishness of preaching to save those who believe.

2 Corinthians 3:14

But their minds were hardened. For until this very day, the same veil remains upon the reading of the old covenant, not being uncovered, because it is done away with in Christ.

2 Corinthians 4:4

among whom the god of this age has blinded the minds of the unbelievers, so that they would not see the light of the gospel of the glory of Christ, who is the image of God.

Colossians 1:21

And {although you were formerly alienated} and enemies in attitude, because of your evil deeds,

James 4:4

Adulterous people! Do you not know that friendship with the world is enmity with God? Therefore whoever wants to be a friend of the world makes [himself] an enemy of God.

1 John 2:11

But the one who hates his brother is in the darkness, and walks in the darkness, and does not know where he is going, because the 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
Have regard for the covenant, because [the] dark places of [the] land are full of [the] haunts of violence.
Psalm 115:4
Their idols [are] silver and gold, [the] work of human hands.
Isaiah 44:18
They do not know, and they do not understand, for their eyes [are] besmeared {so that they cannot see}, their {minds} {so that they have no insight}.
Isaiah 46:5
To whom will you liken me, and count as equal, and compare with me, as though we were alike?
Acts 17:30
Therefore [although] God has overlooked the times of ignorance, he now commands all people everywhere to repent,
Acts 26:17
rescuing you from the people and from the Gentiles to whom I am sending you,
Romans 1:21
For [although they] knew God, they did not honor [him] as God or give thanks, but they became futile in their reasoning, and their senseless hearts were darkened.
1 Corinthians 1:21
For since, in the wisdom of God, the world through its wisdom did not know God, God was pleased through the foolishness of preaching to save those who believe.
2 Corinthians 4:4
among whom the god of this age has blinded the minds of the unbelievers, so that they would not see the light of the gospel of the glory of Christ, who is the image of God.
Galatians 4:8
But at that time [when you] did not know God, you were enslaved to the things which by nature are not gods.
1 Thessalonians 4:5
not in lustful passion, just as also the Gentiles who do not know God;

Alienated

Ephesians 2:12
that you were at that time apart from Christ, alienated from the citizenship of Israel, and strangers to the covenants of promise, not having hope, and without God in the world.
Romans 8:7
because the mindset of the flesh [is] enmity toward God, for [it is] not subjected to the law of God, for [it is] not able [to do so],
Galatians 4:8
But at that time [when you] did not know God, you were enslaved to the things which by nature are not gods.
Colossians 1:21
And {although you were formerly alienated} and enemies in attitude, because of your evil deeds,
1 Thessalonians 4:5
not in lustful passion, just as also the Gentiles who do not know God;
James 4:4
Adulterous people! Do you not know that friendship with the world is enmity with God? Therefore whoever wants to be a friend of the world makes [himself] an enemy of God.

Because

Romans 1:21
For [although they] knew God, they did not honor [him] as God or give thanks, but they became futile in their reasoning, and their senseless hearts were darkened.
Romans 2:19
and are confident [that] you yourself are a guide of the blind, a light of those in darkness,
1 John 2:11
But the one who hates his brother is in the darkness, and walks in the darkness, and does not know where he is going, because the darkness has blinded his eyes.

General references

Leviticus 11:16
and {the ostrich} and the short-eared owl and the seagull and the hawk according to its kind,
Deuteronomy 29:4
But Yahweh has not given to you a heart to understand, or eyes to see, or ears to hear, [even] {to this day}.