Mark 4:12
'Though they have eyes, they may see without perceiving; And though they have ears, they may hear without understanding; Lest some day they should turn and be forgiven.'
Mark 8:17-21
And, noticing this, Jesus said to them: "Why are you talking about your being short of bread? Do not you yet see or understand? Are your minds still so slow or comprehension?
Ephesians 2:11
Remember, therefore, that you were once Gentiles yourselves, as your bodies showed; you were called 'The Uncircumcised' by those who were called 'The Circumcised'--circumcised only by the hand of man!
2 Thessalonians 2:10-12
to the ruin of those who are on the path to destruction, because they have never received and loved the Truth to their own Salvation.