I'm not sure I agree that a left brain without a right will go insane. I'm certain that the right brain would go insane without the left.
Then again, perhaps sanity is just another social construct.
I applaud you on your analysis, Sab, but I tend to think the simplest solution is most often the correct one. Those who edited and compiled the book we now call the Bible clearly wanted the message to be that God literally told the Bible writers what to write. So they put those words in the scriptures attributed to both Paul and Peter, the two biggest bigwigs in the historical establishment of the church. It really is that simple.