"What the Holy Scriptures give us is God's Truth -- but not exhaustively."
I look at it this way. It is like a driving instructor explaining how to drive a car. He talks about starting the engine, the tach, the speedometer, the brake and gas. He may even explain how and when to change the oil, add gas and check the water, tire pressure, etc. But he won't usually go into ring tolerances and gear clearances.
It doesn't mean he doesn't know, but it does mean not everything has to be covered in order to drive and maintain your car. The information is very effective at serving the purpose for which it is imparted.
Very well put, RobRoy! :^) Thanks!