John 10:6
Jesus told them this allegory, but they did not understand what he was saying to them;
Matthew 13:13-14
This is why I speak to them in parables, because for all their seeing they do not see and for all their hearing they do not hear or understand.
Matthew 13:51
Have you understood all this?" They said to him, "Yes."
John 6:52
The Jews then wrangled with one another, saying, "How can he give us his flesh to eat?"
John 6:60
Now many of his disciples, on hearing it, said, "This is hard to take in! Who can listen to talk like this?"
John 7:36
What does he mean by saying, 'You will search for me but you will not find me, and where I go, you cannot come'?"
John 8:27
They did not understand he was speaking to them about the Father;
John 8:43
Why do you not understand my speech? Because you are unable to listen to what I am saying.
John 16:25
I have told you this in figures, but the time is coming when I shall speak to you in figures no longer; I shall let you know plainly about the Father.
1 Corinthians 2:14
The unspiritual man rejects these truths of the Spirit of God; to him they are 'sheer folly,' he cannot understand them. And the reason is, that they must be read with the spiritual eye.
1 John 5:20
We know that the Son of God has come, and has given us insight to know Him who is the Real God; and we are in Him who is real, even in his Son Jesus Christ. This is the real God, this is life eternal.