13 That is why I speak to them in parables, because, though they have eyes, they do not see, and though they have ears, they do not hear or understand.
Matthew 13:13 Cross References - Twentieth_Century
Matthew 13:16
16 But blessed are your eyes, for they see, and your ears, for they hear;
Mark 8:17-18
John 3:19-20
John 9:39-41
39 And Jesus added: "It was to put men to the test that I came into this world, in order that those that cannot see should see, and that those that can see should become blind."
40 Hearing this, some of the Pharisees who were with him said: "Then are we blind too?"
41 "If you had been blind," replied Jesus, "you would have had no sin to answer for; but, as it is, you say 'We can see,' and so your sin remains.
2 Corinthians 4:3-4
3 And, even if the Good News that we bring is veiled, it is veiled only in the case of those who are on the path to Ruin--
4 Men whose minds have been blinded by the God of this Age, unbelievers as they are, so that the light from the Good News of the glory of the Christ, who is the very incarnation of God, should not shine for them.