CV: Romans 8:16; 2Cor6:14; Romans 10:6
A8: "And how do we determine who has the authentic, orthodox and authoritative interpretation of these passages?"
CV: "Again, by the Holy Spirit."
A8: And how do we determine who has the Spirit?
Do you notice your circular reasoning?
-A8
To those without the spirit it will appear as foolishness. Without the Spirit, one is reduced to soulish perception which is indeed circular and one indication a soulish life is insufficient for eternal life.
I suspect though we may all be indwelt here on these threads, but perhaps some not filled with the Holy Spirit.
Romans 10:6 sufficiently addresses how to respond to the question of who has the Spirit.