Matthew 13:13-15

New International Version

¹³This is why I speak to them in parables:

“Though seeing, they do not see;
though hearing, they do not hear or understand.^(A)

¹⁴In them is fulfilled^(B) the prophecy of Isaiah:

“‘You will be ever hearing but never understanding;
    you will be ever seeing but never perceiving.
¹⁵For this people’s heart has become calloused;
    they hardly hear with their ears,
    and they have closed their eyes.
Otherwise they might see with their eyes,
    hear with their ears,
    understand with their hearts
and turn, and I would heal them.’^[a]^(C)

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Footnotes

Matthew 13:15 Isaiah 6:9,10 (see Septuagint)

John 12:37-40

New International Version

Belief and Unbelief Among the Jews

³⁷Even after Jesus had performed so many signs^(A) in their presence, they still would not believe in him. ³⁸This was to fulfill the word of Isaiah the prophet:

“Lord, who has believed our message
and to whom has the arm of the Lord been revealed?”^[a]^(B)

³⁹For this reason they could not believe, because, as Isaiah says elsewhere:

⁴⁰“He has blinded their eyes
    and hardened their hearts,
so they can neither see with their eyes,
    nor understand with their hearts,
    nor turn—and I would heal them.”^[b]^(C)

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Footnotes

John 12:38 Isaiah 53:1
John 12:40 Isaiah 6:10

Acts 28:24-27

New International Version

²⁴Some were convinced by what he said, but others would not believe.^(A) ²⁵They disagreed among themselves and began to leave after Paul had made this final statement: “The Holy Spirit spoke the truth to your ancestors when he said^(B) through Isaiah the prophet:

²⁶“‘Go to this people and say,
“You will be ever hearing but never understanding;
    you will be ever seeing but never perceiving.”
²⁷For this people’s heart has become calloused;^(C)
    they hardly hear with their ears,
    and they have closed their eyes.
Otherwise they might see with their eyes,
    hear with their ears,
    understand with their hearts
and turn, and I would heal them.’^[a]^(D)