Their lives evidence no Holy Spirit, which lack thereof is evidence they are not born again.
The church in Corinth had many born again believers. It also had many problems with some of them.
Some were said to be soulish. Some were said to be fleshly.
Some were said to be infants in Christ, who by that time should have frown more.
You cannot say they had absolutely no evidence of having received the Lord.
There is a difference with born again Christians in what OUGHT to be and what actually IS.
Why, you and I are not always up to the standard of what we OUGHT to be in the Lord.
Because there is a distinction in the NT between the overcoming and the defeated, Paul says
the latter who are
"approved" are made manifest by the former unapproved though both are regenerated Christians.
For first of all, when you come together in the church, I hear that divisions exist among you; and some part of it I believe.
For there must even be parties among you, that those who are approved may become manifest among you. (1 Cor. 11:18,19)
Or it implies that pagans as new Christians needed a lot of instruction regarding and encouragement in being obedient to a whole new paradigm. There was a whole lotta' turning around going on.
In Corinth there were all regenerated believers.
To the church of God which is in Corinth, to those who have been sanctified in Christ Jesus, the called saints, with all those who call upon the name of our Lord Jesus Christ in every place, who is theirs and ours: (1 Cor. 1:2)
Yet there were degrees of maturity ranging from very retarded and defeated to those "approved" and ovrcoming.
Like in all the churches receiving these letters, some were at the standard and others were below the standard.
It would be nice if we simply said that all those habitially below the standard are simply not born again.
To be sure there are false believers. But to be realistic not ALL genuinely regenerated Christians are consistently
AT the standard. Therefore there is the need for shepherding, nourishing, exhorting, and admonishing one another
that we all may be healthy in the faith.
As former pagans, they much needed instruction regarding in what they were to cooperate. And then they must understand it well enough to know how to apply it. That didn't take place over night with no culture around them to model it for them.
Paul was planting former-pagan Christians among more pagans.
Salvation is not a carefree ride.
That is part of the point I am making also.
Ie. "Going to Heaven" unsanctified sunjectively, unttransformed, unconformed, natural, even fleshly.
The "Get your born-again ticket" of many encourages this "carefree ride."
And a lack of vision causes the people to have no restraint.
We need to see that Christ died for the church. Yet he died for me. But His dying for me was part of His dying to
obtain the church. And the church is the dispensing of God's life and nature into man to saturate him and permeat him
for His spotless bride.
In the Lord's recovery we receive daily this impartation of a high vision.
Our salvation and daily living in Christ's grace is for the building up of the bride.
The goal is guaranteed, the power is guaranteed, but direction and execution by us is also required.
New babes, formerly pagans, need to be reminded and exhorted to this so that the power which operates only on the rails does not find them off the rails. That required of them learning and a whole new paradigm shift.
Yes, John was subject to the same exhortations that he gave.
The loss has nothing to do with a supposed "millennial kingdom" derived from literal interpretation of prophecies which God said he speaks in riddles and not clearly (Nu:12:8), and has everything to do with one's eternal reward in the next life (after the resurrection).
Yes the suffering of loss rather than receiving reward must have everything to do with the millennial kingdom.
The church age is over.
Still some saved forever have work needed to be done upon them.
That is one reason why there IS this intervening period of one thousand years.
Before the eternal age, the one thousand year period of reward or punishment is placed before us
as an incentive.
You see God in His wisdom knew that some would take cheaply His grace.
Those who did not nullify this effective all-powerful grace will be reward to co-reign in the millennium.
And the scope of possibilities of what it means during that time to
"suffer loss" is as wide as Christ needs it to be.
The appropriate level of discipline He will administer.