John 8:43
Why do you not understand what I say? Can you not hear me?
Jeremiah 6:10
To whom can I speak and give warning that they may hear? Their ears are closed and they cannot listen. Behold, the word of Jehovah has become a reproach to them. They have no delight in it.
John 7:17
If any man does his will he shall know the teachings. He will know if it is from God, or whether I speak from myself.
Proverbs 28:5
Evil men do not understand justice. Those who seek Jehovah understand all things.
Isaiah 6:9
He said: Go and tell this people: 'Hear constantly but do not understand. See constantly but do not perceive.'
Isaiah 44:18
They do not know or understand anything. Their eyes are plastered shut and cannot see. Their minds are closed and therefore they cannot understand.
Hosea 14:9
Let the wise understand these things. Let the discerning know them. For the ways of Jehovah are right. And the righteous will walk in them. But transgressors will stumble in them.
Micah 4:12
They do not know Jehovah's thoughts. Neither do they understand his counsel. He has gathered them like the sheaves of cut grain to the threshing floor.
John 5:43
I came in my Father's name and you did not receive me. If another came in his own name you would receive him.
John 6:60
When they heard this many of his disciples said: This is a hard saying; who can listen to it?
John 8:27
They were not aware that he spoke to them about the Father.
John 12:39-40
Isaiah revealed the reason they could not believe:
Acts 7:51
You obstinate men who are uncircumcised in heart and ears. You always resist the Holy Spirit as your fathers did.
Romans 3:11
There is no one who has insight. No one seeks God!
Romans 8:7-8
This is because the mind of the flesh is hostile toward God. It is not subject to the law of God for it cannot be.