For this people’s heart has grown dull; they hear with heavy ears and they have shut their eyes — otherwise they would see with their eyes, hear with their ears, understand with their heart and turn back, and I would heal them.’
In context
25They disagreed among themselves and began to leave, and Paul added one last word: “The Holy Spirit spoke rightly to your ancestors through the prophet Isaiah: 26‘Go to this people and say: You will hear and hear, and never understand; you will look and look, and never see. 27For this people’s heart has grown dull; they hear with heavy ears and they have shut their eyes — otherwise they would see with their eyes, hear with their ears, understand with their heart and turn back, and I would heal them.’ 28So let it be known to you that this salvation of God has been sent to the Gentiles; and they will listen.” 29When he had said this, the Jews left, arguing heatedly among themselves.