It’s really very interesting.
Clearly, we ride looser to Scripture than most Reform folks do — at least at first appearance. But it still seems that among those who claim Sola Scriptura there are irreconcilable differences, maybe not of highest importance but high enough to keep people from worshipping together, while the OPC calls at least one of them a damnable heresy.
Where it gets interesting is in the interpretation of “difficult” verses, Col 1:24 comes to mind, or the double barrel Phil 2:12-13.
Oh well, it’s all interesting.
On the Philippians passage, “Work out your own salvation with fear and trembling, etc.,” and bringing into it the standard that the Bible does interpret itself, it has to mean that we must work out our new lives within the knowledge of the great gift our salvation is, knowing we have been snatched from the fire, that we live in reliance only upon Christ, etc.
It does not make sense to say, after all of God’s miraculous redemptive work, from providing a sacrifice to save Isaac to Christ, our sacrifice, that we would suddenly, based upon one verse, be cast out to figure out, to work at, to fashion somehow a salvation for ourselves.
That would negate the entire message of Scripture in one passage, and insult the great sacrifice of Jesus. So, SS comes to the rescue, with the Scripture interpreting itself.