For whatsoever things were written aforetime were written for our learning, that through patience and through comfort of the scriptures we might have hope.
- Romans 15:4
Ever consider that Paul wasn't referencing his own letters to the congregations? And he certainly wasn't referring to the Gospels which hadn't even been written yet. Anybody else ever notice this?
I think he's most likely referring to the Septuagint (the Old Testament that had been translated into Greek). The same goes with 2 Timothy 3:16:
All Scripture is inspired of God+ and beneficial for teaching,+ for reproving, for setting things straight,* for disciplining in righteousness,+ 17 so that the man of God may be fully competent, completely equipped for every good work.
These letters were never meant to be self referencing. We know this because in the verse right before this one it says "from childhood you have known the Holy Scriptures" (the Holy Scriptures existing prior to his writings). It's so odd that this realization never occurred to me while I was a JW. And that Elders will quote Paul and then cite another writing of Timothy or Paul for "setting things straight" or "disciplining" as though that's what Paul or Timothy were talking about.
So weird! Paul claimed to have a revelation on the way to Damascus where he met ghost Jesus. But he never claimed that his writings were of divine inspiration.