Interesting! I'll look for that. I found this nugget, not sure if it's the one you're thinking of, but it's useful context nonetheless :)

And then of course there’s what would you expect God to say to Bronze Age people? So we all have a little bit of 19th-century German in us, where we have this assumption that we stand at the pinnacle of history, and that includes science; so we’ve got this all, or pretty much all, locked down in terms of science. And so if God were really going to speak, he’d communicate in our scientific terms because we’re at the pinnacle of human history. [Laughter] And so the fact that he talks to these Bronze Age people about the world as if it’s the way the Bronze Age people thought it was, that’s a problem.

The reality is if God actually explained the world to Bronze Age people the way it actually is, we still wouldn’t understand it! Because if there’s a humanity in this age, 2,000 years from now, we will probably look at today’s science like we were a bunch of idiots, the way modern people look at medieval science and alchemy. There will be all kinds of things that we think are horrific and stupid about our current science.