Sorry to be verbose, but one final point, to follow my two previous posts.
Remember Saul of Tarsus' conversion? Very dramatic. Came from heaven.
True, but the prelude to that, I believe, was long coming. Saul heard the speech of Stephen in Acts 7. He also saw that his face was like that of an angel (6:15). Paul got exposed to the gospel. He heard it again and again, as he entered homes, and dragged them out for punishment (Acts 8:3). And the dying Christians testified to him, of the Lord Jesus Christ, of His kingdom, power and glory.
At some point the incongruity became too great to bear, and he fell down, hearing, "Saul, Saul, why are you persecuting Me?" The disconnect of "doing good by doing bad" became too extreme, and unsupportable.
So my counsel is to establish mutually-assented logic. And if those with whom you converse say something like, "All Scripture is indeed profitable, and are indeed words of spirit and life, unless of course the 'ministry of the age' tells us it's vain", then they've established their position, out loud. Their ears have heard their mouth speak that 'God's current oracle' can contravene the Bible, and its reception in Christian history, and being 'one' with this supposed oracle is greater than what scripture has established concerning itself. . . at some point the disconnect, the incongruity, the illogic of this position will become unbearable, and they'll reject it. So be patient with them, and allow them to state things which seem unsupportable. Don't cover your ears and run away screaming. . . at some point their own conscience will begin to nag at them. The illogic of teaching on the Bible while simultaneously dismissing it will simply become too great.
And remember Stephen's face.