About a year ago I was sitting in a really shitty corporate cafe and reading a book about medieval astronomy. There was a passage about how when we look up at the sky, we see titanic balls of gas all whirling about according to physics, but when a medieval person looked up at the sky, they saw literal divine clockwork turned by uncountable invisible spirits.
I was sitting in a shitty cafe, and I had a moment of realization. I knew logically that's how people used to see the night sky, but something about that moment just clicked. I felt what I can only describe as intellectual vertigo, as I realized "holy shit the world is really different than it was 700 years ago."