Summary of text [comment] page 14.

In John, “lack of faith in the Son of God” is represented as “lasting sin”.

“Lasting sin” is “iniquity”.

John speaks of a “final hardening” that is a definitive turning away from the Son of God.  The “final hardening” leads to “eternal damnation”.

[Here, we have some more associations:

lasting sin; similar to “way of the flesh” : includes “denial of law^essential₃(_₂(disposition₁))” that presumes “think^group₃(_₂(conscience^lacking₁))”.

iniquity : law^essential exists despite denials. Others suffer consequences of a sinner’s transgressions.]