You know, people often speak of the true scale of the universe crushing them into insignificance.
Personally, I have never experienced that. It's honestly probably just down to learning cosmology at an unusually early age, but the universe utterly dwarfing us is normal and neutral to me.
Instead, the idea of a humano-centric cosmos is what terrifies me. It fills me with a smothering claustrophobia. ALL OF THAT, and it's just for us? What the entire HELL?
Maybe the cosmos is structured so we'll never *meet* our peers; but it is genuinely inconceivable to me that we are alone in the universe. I can't express the probability I assign to that outcome in a toot, at least without using exotic notation. The notion of some divinity who created everything we see out there just as set dressing for us? That is the true definition of religious terror.