John 12:39

Wherefore were they not able to believe, because Isaiah again said,

John 5:44

How are you able to believe, receiving glory from one another, and do not seek the glory which is with God only?

John 6:44

No one is able to come unto me, unless the Father who sent me may draw him: and I will raise him up in the last day.

John 10:38

If I do, believe not me, believe the works: that you may know and understand that the Father is in Me, and I in the Father.

2 Peter 2:14

having eyes full of an adulteress, and unable to cease from sin; beguiling unestablished souls: having a heart which has been made fat with covetousness; children of the curse:

Treasury of Scripture Knowledge

Summary

Therefore they could not believe, because that Esaias said again,

General references

Bible References

They

John 5:44
How are you able to believe, receiving glory from one another, and do not seek the glory which is with God only?
John 6:44
No one is able to come unto me, unless the Father who sent me may draw him: and I will raise him up in the last day.
John 10:38
If I do, believe not me, believe the works: that you may know and understand that the Father is in Me, and I in the Father.
2 Peter 2:14
having eyes full of an adulteress, and unable to cease from sin; beguiling unestablished souls: having a heart which has been made fat with covetousness; children of the curse:

General references

John 1:5
And the light shineth in the darkness, and the darkness comprehended it not.
John 9:18
Then the Jews did not believe concerning him, that he was blind, and looked up, until they called the parents of him that looked up,
John 10:37
If I do not the works of my Father, believe me not.