John 8:43

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

John 7:17

If any man will do his will, he shall know respecting the doctrine, whether it is of God, or whether I speak from myself.

John 5:43

I have come in my Father's name, and ye receive me not: if another come in his own name, him ye will receive.

John 6:60

Many therefore of his disciples, who heard him, said, Difficult is this discourse, who is able to fathom it?

John 8:27

They knew not that he spake to them of the Father.

John 12:39-40

For this reason they could not believe, because Isaiah had said again;

Acts 7:51

Ye stiff-necked and uncircumcised in heart and in ears, ye do always oppose yourselves against the Holy Ghost: as your fathers, so are ye.

Romans 3:11

there is none that understandeth, there is none that seeketh after God.

Romans 8:7-8

Because the propensity of the flesh is inimical against God: for it is not in subjection to the law of God, neither indeed can it be.

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 knew not that he spake to them of the Father.
John 5:43
I have come in my Father's name, and ye receive me not: if another come in his own name, him ye will receive.
John 7:17
If any man will do his will, he shall know respecting the doctrine, whether it is of God, or whether I speak from myself.
John 12:39
For this reason they could not believe, because Isaiah had said again;
Romans 3:11
there is none that understandeth, there is none that seeketh after God.

Ye cannot

John 6:60
Many therefore of his disciples, who heard him, said, Difficult is this discourse, who is able to fathom it?
Acts 7:51
Ye stiff-necked and uncircumcised in heart and in ears, ye do always oppose yourselves against the Holy Ghost: as your fathers, so are ye.
Romans 8:7
Because the propensity of the flesh is inimical against God: for it is not in subjection to the law of God, neither indeed can it be.

General references

Matthew 16:11
How is it that ye do not understand, that I spake not to you of bread, to beware of the leaven of the Pharisees and of the Sadducees?
Matthew 25:42
for I was hungry, and ye gave me nothing to eat: I was thirsty, and ye gave me nothing to drink:
John 7:17
If any man will do his will, he shall know respecting the doctrine, whether it is of God, or whether I speak from myself.
John 8:27
They knew not that he spake to them of the Father.
John 16:9
of sin first, because they believe not in me;