Hebrews 5:11
Now on this subject I have much to say, but it is difficult to explain it to you, because you have shown yourselves so slow to learn.
2 Peter 3:16
It is the same in all his letters, when he speaks in them about these subjects. There are some things in them difficult to understand, which untaught and weak people distort, just as they do all other writings, to their own Ruin.
Matthew 13:15
For the mind of this nation has grown dense, And their ears are dull of hearing, Their eyes also have they closed; Lest some day they should perceive with their eyes, And with their ears they should hear, And in their mind they should understand, and should turn--And I should heal them.'
Mark 8:17-18
And, noticing this, Jesus said to them: "Why are you talking about your being short of bread? Do not you yet see or understand? Are your minds still so slow or comprehension?
Mark 8:21
"Do not you understand now?" he repeated.
Luke 24:25
Then Jesus said to them: "O foolish men, slow to accept all that the Prophets have said!
John 6:6
He said this to test him, for he himself knew what he meant to do.
John 16:12
I have still much to say to you, but you cannot bear it now.
Acts 28:27
For the mind of this nation has grown dense, and their ears are dull of hearing, their eyes also have they closed; lest some day they should see with their eyes, and with their ears they should hear, and in their mind they should understand, and should turn--and I should heal them.'