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“The universe is a dark forest. Every civilization is an armed hunter stalking through the trees like a ghost, gently pushing aside branches that block the path and trying to tread without sound. Even breathing is done with care. The hunter has to be careful, because everywhere in the forest are stealthy hunters like him. If he finds other life—another hunter, an angel or a demon, a delicate infant or a tottering old man, a fairy or a demigod—there’s only one thing he can do: open fire and eliminate them. In this forest, hell is other people. An eternal threat that any life that exposes its own existence will be swiftly wiped out. This is the picture of cosmic civilization. It’s the explanation for the Fermi Paradox.”
― Liu Cixin, The Dark Forest

“Vulcan?" Leo demanded. "I don't even LIKE Star Trek!”
― Rick Riordan, The Lost Hero

“Those two axioms are solid enough from a sociological perspective … but you rattled them off so quickly, like you’d already worked them out,” Luo Ji said, a little surprised. “I’ve been thinking about this for most of my life, but I’ve never spoken about it with anyone before. I don’t know why, really.… One more thing: To derive a basic picture of cosmic sociology from these two axioms, you need two other important concepts: chains of suspicion, and the technological explosion.” “Interesting terms. Can you explain them?” Ye Wenjie glanced at her watch. “There’s no time. But you’re clever enough to figure them out. Use those two axioms as a starting point for your discipline, and you might end up becoming the Euclid of cosmic sociology.” “I’m no Euclid. But I’ll remember what you said and give it a whirl. I might come to you for guidance, though.” “I’m afraid there won’t be that opportunity.… In that case, you might as well just forget I said anything. Either way, I’ve fulfilled my duty. Well, Xiao Luo, I’ve got to go.” “Take care, Professor.” Ye Wenjie went off through the twilight to her final meet-up. The”
― Liu Cixin, The Dark Forest

“Star Trek?” I asked her. “Really?”
“What?” she demanded, bending unnaturally black eyebrows together.
“There are two kinds of people in the universe, Molly,” I said. “Star Trek fans and Star Wars fans. This is shocking.”
She sniffed. “This is the post-nerd-closet world, Harry. It’s okay to like both.”
“Blasphemy and lies,” I said.”
― Jim Butcher, Ghost Story