Some of the most beautiful moments in science - for me, anyway - come about when there's a refresh on perspective. You'll have something like the ptolemaic system, or phlogiston, or the luminiferous ether, and a tiny push in perception reveals a bigger picture, a deeper understanding.

That push is often subtle, but incontrovertible.

Modern cosmology really feels like it's on the cusp of something like that today - perhaps in how spatial dimensions emerge, or some other thing - underlying our more stolid mental models.