John 8:43
How is it that you do not understand what I say? It is because you cannot bear to listen to my Message.
John 7:17
If any one has the will to do God's will, he will find out whether my teaching is from God, or whether I speak on my own authority.
John 5:43
I have come in my Father's name, and you do not receive me; if another comes in his own name, you will receive him.
John 6:60
On hearing it, many of his disciples said: "This is harsh doctrine! Who can bear to listen to it?"
John 8:27
They did not understand that he meant the Father.
John 12:39-40
The reason why they were unable to believe is given by Isaiah elsewhere, in these words--
Acts 7:51
O! stubborn race, heathen in heart and ears, you are for ever resisting the Holy Spirit; your ancestors did it, and you are doing it still.
Romans 3:11
Not one who understands, not one who is searching for God!
Romans 8:7-8
Because to be earthly-minded is to be an enemy to God, for such a mind does not submit to the Law of God, nor indeed can it do so.