Today, we continue to do so. And it's to be expected. We are, after all, human. We will err. And, for the believer, an infallible corrective is God's Word. So where else have we corrected our thinking?
Well, we now know that 2,000 years of Christians and beyond were all wrong when they thought, as Jesus and Paul and all those guys did, that Genesis was historical narrative. Darwin, thankfully, corrected that. We know now that Genesis is myth -- a sort of parable, I suppose -- and Jesus was mistaken, caught up as He was with His culture, and God did not create all that is out of nothing, but did it by Evolution. Thanks for clearing that up.
All this time we thought that Man was created in the image of God, giving Man a special value beyond the beasts. Now we know that our value is just what we make it, so executing babies in the womb isn't such a bad thing. It's birth control ("Reproductive rights"). (Oh, yeah, and that whole "birth control" thing ... we know better on that now, too, don't we?)
All of Judaism and all of Christianity has held for the longest time silly rules about sex as if they were of God. You know, "It's a sin to have sex outside of marriage" or "It's a sin to engage in sex between two people of the same sex" ... that kind of thing. We Christians are so much more enlightened today.
We've been sadly mistaken on the nature of God in the past, but no longer.
"See now that I, even I, am He, and there is no god beside Me; I kill and I make alive; I wound and I heal; and there is none that can deliver out of My hand." (Deut 32:39)These are both quotes from the lips of God Himself. Both make the claim by God that He does what we consider "bad things". He creates calamity. He wounds and kills. Bad! Bad God! Of course, we're smarter than that. No believer says, "Bad God!" Clearly, then, times have changed. Maybe back then He did things like that, or, more likely, He never did -- they just thought He did. We're much wiser these days. We've figured it out.
"I am the LORD, and there is no other. I form light and create darkness, I make well-being and create calamity, I am the LORD, who does all these things." (Isa 45:6-7)
Oh, how about women's issues? The Bible is abundantly clear that wives are to submit to husbands (Eph 5:22-24,33; Col 3:18; 1 Peter 3:1-6; 1 Cor 11:3). In today's age we've figured out how misguided that was. We're pretty sure that the commands to husbands in the related passages are still in effect, but not to wives. Paul was not unclear when he refused to allow women "to teach or to exercise authority over a man" (1 Tim 2:12-14), giving as his basis the order of Creation and the Fall of Man, but we understand today much clearer that he was only talking about the education levels of women. So while uneducated people like Peter and John were allowed to have positions of teaching and authority over men in those days, women were not. Today, that issue is ended and we are so much smarter.
These are just a few examples. There are lots of these things. if you think about it. The Church has been wrong for millennia. We've figured it out. Times have sure changed. Good thing God has us on His side to figure this stuff out for the rest of the world.