If God, being perfect, uses only the WT organization to convey what we need to be taught, there should be no errors. As far as 'the light getting brighter", why would a God of love allow his people to stumble around in darkness in the first place? I don't want to worship a God who doesn't care if his teachings today are accurate or not, and makes absoluty NO haste to correct the teachings we now know to be false until after the fact. I'd really like to think that God, being perfect, would not make errors that need corrected in the fist place. And don't start about the 'human' factor adding errors to his organization because they're not perfect. That's simply not acceptable from a divine, all knowing, all powerful God who wants to teach us something today. It's just not. Sorry.
ethos, these are just my personal feelings. And I'm new at this and not trying to argue. Please don't waste your time or mine with scriptural rebuttal. I know them all. I've had 35 years to learn them. At this point, after so, so many errors in teaching, I'm choosing to use some common sense. You could try, too.