John 8:43

How is it you do not understand me when I speak? It is because you cannot bear to listen to my words.

John 7:17

If any one is willing to do His will, he shall know about the teaching, whether it is from God or originates with me.

John 5:43

I have come as my Father's representative, and you do not receive me. If some one else comes representing only himself, him you will receive.

John 6:60

Many therefore of His disciples, when they heard it, said, "This is hard to accept. Who can listen to such teaching?"

John 8:27

They did not perceive that He was speaking to them of the Father.

John 12:39-40

For this reason they were unable to believe--because Isaiah said again,

Acts 7:51

"O stiff-necked men, uncircumcised in heart and ears, you also are continually at strife with the Holy Spirit--just as your forefathers were.

Romans 3:11

There is not one who is really wise, nor one who is a diligent seeker after God.

Romans 8:7-8

Abandonment to earthly things is a state of enmity to God. Such a mind does not submit to God's Law, and indeed cannot do so.

Treasury of Scripture Knowledge

Summary

Why do ye not understand my speech? even because ye cannot hear my word.

Bible References

Do

John 8:27
They did not perceive that He was speaking to them of the Father.
John 5:43
I have come as my Father's representative, and you do not receive me. If some one else comes representing only himself, him you will receive.
John 7:17
If any one is willing to do His will, he shall know about the teaching, whether it is from God or originates with me.
John 12:39
For this reason they were unable to believe--because Isaiah said again,
Romans 3:11
There is not one who is really wise, nor one who is a diligent seeker after God.

Ye cannot

John 6:60
Many therefore of His disciples, when they heard it, said, "This is hard to accept. Who can listen to such teaching?"
Acts 7:51
"O stiff-necked men, uncircumcised in heart and ears, you also are continually at strife with the Holy Spirit--just as your forefathers were.
Romans 8:7
Abandonment to earthly things is a state of enmity to God. Such a mind does not submit to God's Law, and indeed cannot do so.

General references

Matthew 16:11
How is it you do not understand that it was not about bread that I spoke to you? But beware of the yeast of the Pharisees and Sadducees."
Matthew 25:42
For when I was hungry, you gave me nothing to eat; when thirsty, you gave me nothing to drink;
John 7:17
If any one is willing to do His will, he shall know about the teaching, whether it is from God or originates with me.
John 8:27
They did not perceive that He was speaking to them of the Father.
John 16:9
of sin, because they do not believe in me;