John 10:6
This parable Jesus spake unto them; but they did not understand what He said to them.
Matthew 13:13-14
for this reason I speak to them in parables; because though they see, they will not see; and though they hear, they will not hear, nor understand.
Matthew 13:51
Then saith Jesus unto them, Did ye understand all these? they say unto Him, Yes, Lord: and He said unto them,
John 6:52
The Jews therefore cavilled amongst themselves, saying, How can this man give us his flesh to eat?
John 6:60
Many therefore of his disciples, when they heard Him, said, This discourse is hard to be understood, who can take it in?
John 7:36
What is the meaning of this speech, that He said, "Ye shall seek me, and shall not find me: and where I am to be, ye cannot come?"
John 8:27
But they did not know that He spake unto them of the Father.
John 8:43
And why do ye not understand my language, but because ye cannot bear my doctrine?
John 16:25
These things have I spoken to you in parables: but the time is coming when I shall no more speak to you in parables, but tell you with plainness concerning the Father.
1 Corinthians 2:14
But the natural man receiveth not the things of the Spirit of God: for they are foolishness to him; and he cannot understand them, because they are spiritually discerned.
1 John 5:20
But we know that the son of God is come, and hath given us understanding, that we may know Him that is true, and we are in Him that is true, and in his son Jesus Christ: He is the true God, and eternal life.