Ephesians 4:18

being darkened in the understanding, being 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 ye were at that time apart from Christ, having been alienated from the commonwealth of Israel, and strangers to the covenants of the promise, having no hope, and without God, in the world;

Galatians 4:8

But then, indeed, not having known God, ye were in servitude to those not by nature gods,

1 Thessalonians 4:5

not in the affection of desire, as also the nations that were not knowing God,

Acts 17:30

the times, indeed, therefore, of the ignorance God having overlooked, doth now command all men everywhere to reform,

Romans 1:21-23

because, having known God they did not glorify Him as God, nor gave thanks, but were made vain in their reasonings, and their unintelligent heart was darkened,

Romans 11:25

For I do not wish you to be ignorant, brethren, of this secret -- that ye may not be wise in your own conceits -- that hardness in part to Israel hath happened till the fulness of the nations may come in;

Psalm 74:20

Look attentively to the covenant, For the dark places of earth, Have been full of habitations of violence.

Psalm 115:4-8

Their idols are silver and gold, work of man's hands,

Isaiah 44:18-20

They have not known, nor do they understand, For He hath daubed their eyes from seeing, Their heart from acting wisely.

Isaiah 46:5-8

To whom do ye liken Me, and make equal? And compare Me, that we may be like?

Daniel 5:20

and when his heart was high, and his spirit was strong to act proudly, he hath been caused to come down from the throne of his kingdom, and his glory they have caused to pass away from him,

Matthew 13:15

for made gross was the heart of this people, and with the ears they heard heavily, and their eyes they did close, lest they might see with the eyes, and with the ears might hear, and with the heart understand, and turn back, and I might heal them.

Mark 3:5

And having looked round upon them with anger, being grieved for the hardness of their heart, he saith to the man, 'Stretch forth thy hand;' and he stretched forth, and his hand was restored whole as the other;

John 12:40

'He hath blinded their eyes, and hardened their heart, that they might not see with the eyes, and understand with the heart, and turn back, and I might heal them;'

Acts 26:17-18

delivering thee from the people, and the nations, to whom now I send thee,

Romans 1:28

And, according as they did not approve of having God in knowledge, God gave them up to a disapproved mind, to do the things not seemly;

Romans 2:19

and hast confidence that thou thyself art a leader of blind ones, a light of those in darkness,

Romans 8:7-8

because the mind of the flesh is enmity to God, for to the law of God it doth not subject itself,

1 Corinthians 1:21

for, seeing in the wisdom of God the world through the wisdom knew not God, it did please God through the foolishness of the preaching to save those believing.

2 Corinthians 3:14

but their minds were hardened, for unto this day the same vail at the reading of the Old Covenant doth remain unwithdrawn -- which in Christ is being made useless --

2 Corinthians 4:4

in whom the god of this age did blind the minds of the unbelieving, that there doth not shine forth to them the enlightening of the good news of the glory of the Christ, who is the image of God;

Colossians 1:21

And you -- once being alienated, and enemies in the mind, in the evil works, yet now did he reconcile,

James 4:4

Adulterers and adulteresses! have ye not known that friendship of the world is enmity with God? whoever, then, may counsel to be a friend of the world, an enemy of God he is set.

1 John 2:11

and he who is hating his brother, in the darkness he is, and in the darkness he doth walk, and he hath not known whither he doth go, because the darkness did blind 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 attentively to the covenant, For the dark places of earth, Have been full of habitations of violence.
Psalm 115:4
Their idols are silver and gold, work of man's hands,
Isaiah 44:18
They have not known, nor do they understand, For He hath daubed their eyes from seeing, Their heart from acting wisely.
Isaiah 46:5
To whom do ye liken Me, and make equal? And compare Me, that we may be like?
Acts 17:30
the times, indeed, therefore, of the ignorance God having overlooked, doth now command all men everywhere to reform,
Acts 26:17
delivering thee from the people, and the nations, to whom now I send thee,
Romans 1:21
because, having known God they did not glorify Him as God, nor gave thanks, but were made vain in their reasonings, and their unintelligent heart was darkened,
1 Corinthians 1:21
for, seeing in the wisdom of God the world through the wisdom knew not God, it did please God through the foolishness of the preaching to save those believing.
2 Corinthians 4:4
in whom the god of this age did blind the minds of the unbelieving, that there doth not shine forth to them the enlightening of the good news of the glory of the Christ, who is the image of God;
Galatians 4:8
But then, indeed, not having known God, ye were in servitude to those not by nature gods,
1 Thessalonians 4:5
not in the affection of desire, as also the nations that were not knowing God,

Alienated

Ephesians 2:12
that ye were at that time apart from Christ, having been alienated from the commonwealth of Israel, and strangers to the covenants of the promise, having no hope, and without God, in the world;
Romans 8:7
because the mind of the flesh is enmity to God, for to the law of God it doth not subject itself,
Galatians 4:8
But then, indeed, not having known God, ye were in servitude to those not by nature gods,
Colossians 1:21
And you -- once being alienated, and enemies in the mind, in the evil works, yet now did he reconcile,
1 Thessalonians 4:5
not in the affection of desire, as also the nations that were not knowing God,
James 4:4
Adulterers and adulteresses! have ye not known that friendship of the world is enmity with God? whoever, then, may counsel to be a friend of the world, an enemy of God he is set.

Because

Romans 1:21
because, having known God they did not glorify Him as God, nor gave thanks, but were made vain in their reasonings, and their unintelligent heart was darkened,
Romans 2:19
and hast confidence that thou thyself art a leader of blind ones, a light of those in darkness,
1 John 2:11
and he who is hating his brother, in the darkness he is, and in the darkness he doth walk, and he hath not known whither he doth go, because the darkness did blind his eyes.

General references

Leviticus 11:16
and the owl, and the night-hawk, and the cuckoo, and the hawk after its kind,
Deuteronomy 29:4
and Jehovah hath not given to you a heart to know, and eyes to see, and ears to hear, till this day,