“‘Be ever hearing, but never understanding; be ever seeing, but never perceiving.’ 10 Make the heart of this people calloused; make their ears dull and close their eyes.[a] Otherwise they might see with their eyes, hear with their ears, understand with their hearts, and turn and be healed.”
Isaiah 6:10Hebrew; Septuagint ‘You will be ever hearing, but never understanding; / you will be ever seeing, but never perceiving.’ / 10 This people’s heart has become calloused; / they hardly hear with their ears, / and they have closed their eyes
2 Corinthians 4:3-4New International Version (NIV)
3 And even if our gospel is veiled, it is veiled to those who are perishing.4 The god of this age has blinded the minds of unbelievers, so that they cannot see the light of the gospel that displays the glory of Christ, who is the image of God.
2 Thessalonians 2:9-12New International Version (NIV)
9 The coming of the lawless one will be in accordance with how Satan works. He will use all sorts of displays of power through signs and wonders that serve the lie,10 and all the ways that wickedness deceives those who are perishing. They perish because they refused to love the truth and so be saved.11 For this reason God sends them a powerful delusion so that they will believe the lie12 and so that all will be condemned who have not believed the truth but have delighted in wickedness.
5 then you will understand the fear of the Lord and find the knowledge of God. 6 For the Lord gives wisdom; from his mouth come knowledge and understanding. 7 He holds success in store for the upright, he is a shield to those whose walk is blameless, 8 for he guards the course of the just and protects the way of his faithful ones.
9 Then you will understand what is right and just and fair—every good path.
21 For although they knew God, they neither glorified him as God nor gave thanks to him, but their thinking became futile and their foolish hearts were darkened.22 Although they claimed to be wise, they became fools23 and exchanged the glory of the immortal God for images made to look like a mortal human being and birds and animals and reptiles.
“‘You will be ever hearing but never understanding; you will be ever seeing but never perceiving. 15 For 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]