John 10:6
This allegory spoke Jesus to them, but they did not know what it was of which he spoke to them.
Psalm 82:5
They know not, neither do they understand; they walk on in darkness: all the foundations of the earth are moved.
Psalm 106:7
Our fathers in Egypt considered not thy wondrous works; they remembered not the multitude of thy loving-kindnesses; but they rebelled at the sea, at the Red Sea.
Proverbs 28:5
Evil men understand not judgment; but they that seek Jehovah understand everything.
Isaiah 6:9-10
And he said, Go; and thou shalt say unto this people, Hearing ye shall hear and shall not understand, and seeing ye shall see and shall not perceive.
Isaiah 56:11
and the dogs are greedy, they know not to be satisfied, and these are shepherds that know not how to discern: they all turn to their own way, every one for his gain, even to the last of them:
Daniel 12:10
Many shall be purified, and be made white, and be refined; but the wicked shall do wickedly: and none of the wicked shall understand; but the wise shall understand.
Matthew 13:13-14
For this cause I speak to them in parables, because seeing they do not see, and hearing they do not hear nor understand;
Matthew 13:51
Jesus says to them, Have ye understood all these things? They say to him, Yea, Lord.
John 6:52
The Jews therefore contended among themselves, saying, How can he give us this flesh to eat?
John 6:60
Many therefore of his disciples having heard it said, This word is hard; who can hear it?
John 7:36
What word is this which he said, Ye shall seek me and shall not find me; and where I am ye cannot come?
John 8:27
They knew not that he spoke to them of the Father.
John 8:43
Why do ye not know my speech? Because ye cannot hear my word.
John 16:25
These things I have spoken to you in allegories; the hour is coming that I will no longer speak to you in allegories, but will declare to you openly concerning the Father.
1 Corinthians 2:14
But the natural man does not receive the things of the Spirit of God, for they are folly to him; and he cannot know them because they are spiritually discerned;
1 John 5:20
And we know that the Son of God has come, and has given us an understanding that we should know him that is true; and we are in him that is true, in his Son Jesus Christ. He is the true God and eternal life.