I'm not following your reasoning...but if we do not depart from iniquity we will be rejected and cast into outer darkness. IF we purge ourselves...through our ACTIONS...from iniquity to do what is right in the eyes of God...then we will have good salvation.
The eternal glory that comes with our salvation is to be that vessel unto honor in His House. It is not obtained by our effort but by looking to the author & finisher of our faith to help us lay aside ever weight & sin for that high prize of our calling. If believers do not look to Jesus for that help, but leave that wood stubble and hay on that foundation and thus leaving themselves as defiled temple of God when the Bridegroom comes, they will be disqualified and left behind to incur a physical death but their spirits are still saved as per 1 Corinthians 3:15-17
That means those saints who do not depart from iniquity are still saved, but they will be resurrected later on as vessels unto dishonor in His House.
The truth goes way deeper than religious factoids you get from reading one verse. Jesus saves us in His net...but God also condemns us by catching us in a net that LOOKS LIKE it has a good ending....but it is a curse...not a blessing. Grace is deceitful...to they who take it the wrong way. Yet the problem isn't grace...but the evil in the hearer. So if a person is encouraged to believe a lie...from a fact...but that goes against the truth....then that one is condemned to be saved into a eternal reproach and shame.
So God lets us fool ourselves. The fool rages and is confident. But God has other plans...based on what sounds very good to the fool.
You can read His words to continue in them. It is by reading the Catholic Catechism and taking that over His words is where believers go astray.