Matthew 13:14

In them the prophecy of Isaiah is being fulfilled, which says,

You will hear and keep on hearing, but never understand;
And you will look and keep on looking, but never comprehend;

Isaiah 6:9-10

And He said, “Go, and tell this people:

‘Keep on listening, but do not understand;
Keep on looking, but do not comprehend.’

Mark 4:12

so that they will continually look but not see, and they will continually hear but not understand, otherwise they might turn [from their rejection of the truth] and be forgiven.”

Luke 8:10

And He said, “To you [who have been chosen] it has been granted to know and recognize the mysteries of the kingdom of God, but to the rest it is in parables, so that though seeing they may not see, and hearing they may not understand.

Ezekiel 12:2

“Son of man, you live among a rebellious house, who have eyes to see but do not see, who have ears to hear but do not hear; for they are a rebellious people.

John 12:39-40

Therefore they could not believe, for Isaiah said again,

Acts 28:25-27

They disagreed among themselves and they began to leave after Paul had made one last statement: “The Holy Spirit rightly spoke through Isaiah the prophet to your fathers, saying,

Romans 11:8-10

just as it is written [in Scripture],

God gave them a spirit of stupor,
Eyes that do not see and ears that do not hear,
[a spiritual apathy that has continued] to this very day.”

2 Corinthians 3:14

But [in fact] their minds were hardened [for they had lost the ability to understand]; for until this very day at the reading of the old covenant the same veil remains unlifted, because it is removed [only] in Christ.

Treasury of Scripture Knowledge

Summary

And in them is fulfilled the prophecy of Esaias, which saith, By hearing ye shall hear, and shall not understand; and seeing ye shall see, and shall not perceive:

Bible References

The prophecy

Isaiah 6:9
And He said, “Go, and tell this people:

‘Keep on listening, but do not understand;
Keep on looking, but do not comprehend.’
Ezekiel 12:2
“Son of man, you live among a rebellious house, who have eyes to see but do not see, who have ears to hear but do not hear; for they are a rebellious people.
Mark 4:12
so that they will continually look but not see, and they will continually hear but not understand, otherwise they might turn [from their rejection of the truth] and be forgiven.”
Luke 8:10
And He said, “To you [who have been chosen] it has been granted to know and recognize the mysteries of the kingdom of God, but to the rest it is in parables, so that though seeing they may not see, and hearing they may not understand.
John 12:39
Therefore they could not believe, for Isaiah said again,
Acts 28:25
They disagreed among themselves and they began to leave after Paul had made one last statement: “The Holy Spirit rightly spoke through Isaiah the prophet to your fathers, saying,
Romans 11:8
just as it is written [in Scripture],

God gave them a spirit of stupor,
Eyes that do not see and ears that do not hear,
[a spiritual apathy that has continued] to this very day.”
2 Corinthians 3:14
But [in fact] their minds were hardened [for they had lost the ability to understand]; for until this very day at the reading of the old covenant the same veil remains unlifted, because it is removed [only] in Christ.

General references

Leviticus 13:29
“When a man or woman has a disease on the head or in the beard (face),
Deuteronomy 29:4
Yet to this day the Lord has not given you a heart and mind to understand, nor eyes to see, nor ears to hear.
Deuteronomy 32:28

“For they are a nation devoid of counsel,
And there is no understanding in them.
Proverbs 20:12

The hearing ear and the seeing eye,
The [omnipotent] Lord has made both of them.
Ezekiel 17:2
“Son of man, ask a riddle and tell a parable to the house of Israel,
Matthew 24:39
and they did not know or understand until the flood came and swept them all away; so will the coming of the Son of Man be [unexpected judgment].