1 Corinthians 2:11 For what man knoweth the things of a man, save the spirit of man which is in him? even so the things of God knoweth no man, but the Spirit of God.

2 Corinthians 4:3 But if our gospel be hid, it is hid to them that are lost:

2 Corinthians 4:4 In whom the god of this world hath blinded the minds of them which believe not, lest the light of the glorious gospel of Christ, who is the image of God, should shine unto them.

Isaiah 6:9 ¶And he said, Go, and tell this people, Hear ye indeed, but understand not; and see ye indeed, but perceive not.

Isaiah 6:10 Make the heart of this people fat, and make their ears heavy, and shut their eyes; lest they see with their eyes, and hear with their ears, and understand with their heart, and convert, and be healed.

Isaiah 42:19 Who is blind, but my servant? or deaf, as my messenger that I sent? who is blind as he that is perfect, and blind as the LORD's servant?