John 8:27 They understood not that he spake to them of the Father.

2 Corinthians 2:3 And I wrote this same unto you, lest, when I came, I should have sorrow from them of whom I ought to rejoice; having confidence in you all, that my joy is the joy of you all.

2 Corinthians 2:4 For out of much affliction and anguish of heart I wrote unto you with many tears; not that ye should be grieved, but that ye might know the love which I have more abundantly unto you.

John 7:17 If any man will do his will, he shall know of the doctrine, whether it be of God, or whether I speak of myself.

1 Corinthians 2:14 But the natural man receiveth not the things of the Spirit of God: for they are foolishness unto him: neither can he know them, because they are spiritually discerned.

Romans 8:7 Because the carnal mind is enmity against God: for it is not subject to the law of God, neither indeed can be.

Romans 8:8 So then they that are in the flesh cannot please God.

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