Isaiah 44:18

⁹He said, “Go, and tell this people, ‘You hear indeed, but don’t understand. You see indeed, but don’t perceive.’ ¹⁰Make the heart of this people fat. Make their ears heavy, and shut their eyes; lest they see with their eyes, hear with their ears, understand with their heart, and turn again, and be healed.”

³Even if our Good News is veiled, it is veiled in those who are dying, ⁴in whom the god of this world has blinded the minds of the unbelieving, that the light of the Good News of the glory of Christ, who is the image of God, should not dawn on them.

³⁹For this cause they couldn’t believe, for Isaiah said again: ⁴⁰“He has blinded their eyes and he hardened their heart, lest they should see with their eyes, and perceive with their heart, and would turn, and I would heal them.”

⁹even he whose coming is according to the working of Satan with all power and signs and lying wonders, ¹⁰and with all deception of wickedness for those who are being lost, because they didn’t receive the love of the truth, that they might be saved. ¹¹Because of this, God sends them a powerful delusion, that they should believe a lie, ¹²that they all might be judged who didn’t believe the truth, but had pleasure in unrighteousness.

²¹‘Hear this now, foolish people without understanding, who have eyes, and don’t see, who have ears, and don’t hear:

¹²So I let them go after the stubbornness of their hearts, that they might walk in their own counsels.

⁵then you will understand the fear of the LORD, and find the knowledge of God. ^6[+] For the LORD gives wisdom. Out of his mouth comes knowledge and understanding. ⁷He lays up sound wisdom for the upright. He is a shield to those who walk in integrity, ⁸that he may guard the paths of justice, and preserve the way of his saints. ⁹Then you will understand righteousness and justice, equity and every good path.

¹⁴In them the prophecy of Isaiah is fulfilled, which says, ‘By hearing you will hear, and will in no way understand; Seeing you will see, and will in no way perceive; ¹⁵for this people’s heart has grown callous, their ears are dull of hearing, and they have closed their eyes; or else perhaps they might perceive with their eyes, hear with their ears, understand with their heart, and would turn again, and I would heal them.’

⁴⁴How can you believe, who receive glory from one another, and you don’t seek the glory that comes from the only God?

²¹Because knowing God, they didn’t glorify him as God, and didn’t give thanks, but became vain in their reasoning, and their senseless heart was darkened.

²²Professing themselves to be wise, they became fools, ²³and traded the glory of the incorruptible God for the likeness of an image of corruptible man, and of birds, four-footed animals, and creeping things.