Mark 8:18
You have eyes, do you not see? you have ears, do you not hear?
Mark 4:12
so that for all their seeing they may not perceive, and for all their hearing they may not understand, lest they turn and be forgiven."
Matthew 13:14-15
In their case the prophecy of Isaiah is being fulfilled: You will hear and hear but never understand, you will see and see but never perceive.
John 12:40
He has blinded their eyes and made their hearts insensible, to prevent them seeing with their eyes and understanding with their hearts and turning for me to cure them.
Acts 28:26-27
when he said, Go and tell this people, 'You will hear and hear but never understand, you will see and see but never perceive.'
2 Peter 1:12
Hence I mean to keep on reminding you of this, although you are aware of it and are fixed in the Truth as it is;