The Governing Body claims they've received "new light" from Jehovah every time they change their doctrine. So where did the "old light" come from that's being replaced? If the old light is incorrect, could it have come from God? If they do claim that new light comes from God but later it proves to be wrong, don't they owe God a public apology? If they don't apologize, aren't they basically claiming that God misdirected them? Romans 3:4 says, "let God be found true, though every man be found a liar."
Of course, this raised the question, Is the Governing Body really giving spiritual "food at the proper time," if it was a lie?
What a can of worms!