Concerning the man who was a brother, whom Paul ordered expelled from the church for unrepentant sin, whom Paul later instructed he should be welcomed back as a brother ...There is some sort of OSAS argument I saw recently saying you can fall into disbelief and still be saved. According to what is posted above, that is not true.
This talks about being guarded through faith. If we fall into unbelief, we have lost our faith, so that negates that part.
was he unsaved, then saved, then unsaved again during his expulsion, then saved again when he was welcomed back?
Does God have children and former children?
Is "born from above" and "a new creation" something that we slip into and out of repeatedly?
Or is it more like the 'prodigal son', who always remained a son of the FATHER and was destined to return home to the Father's waiting arms?
I believe it is the love of God that makes us His children, not our momentary good or bad judgements ... and that same love will irresistibly DRAW us home to OUR Father.
YMMV.