OK.  Now, I understand what you meant.  I would put it a bit differently:  that the Holy Spirit always speaks, but we only capture what we are capable of understanding.  As our capacity (ie understanding of the physical  and psychological sciences) increases, our understanding evolves.  
In essence, I agree with you, although I think that finding error in past understanding does not necessarily point to past fault or evil intent, but more to lack of capacity to understand, based on that time's limitations on knowledge and understanding of physical and psychological sciences.  
Re the "pontificating":  I enjoy it, because it clarifies matters, and that is ALWAYS a good thing.  :-)  But, from my perspective, your wife is always right -- by definition.  :-)