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.
I'm not sure what the "it" is in your sentence, but I'm guessing that you are referring to your circular reasoning in #877. So, you seem to be saying that circular reasoning is not foolish to those with the Spirit.
Romans 10:6 sufficiently addresses how to respond to the question of who has the Spirit.
I have read Romans 10:6, but I do not see how it answer the question: "Who has the Spirit?"
-A8