"“Now, consciousness. That’s a fun thing, isn’t it? Product of an arms race between predators and prey. If you watch a cat creeping up on a mouse, you’ll be able to impute to the cat intentions that are most easily explained by the cat having a theory of mind concerning the mouse—an internal simulation of the mouse’s likely behavior when it notices the predator. Which way to run, for example. And the cat will use its theory of mind to optimize its attack strategy. Meanwhile, prey species that are complex enough to have a theory of mind are at a defensive advantage if they can anticipate a predator’s actions. Eventually this very mammalian arms race gave us a species of social ape that used its theory of mind to facilitate signaling—so the tribe could work collectively—and then reflexively, to simulate the individual’s own inner states. Put the two things together, signaling and introspective simulation, and you’ve got human-level consciousness, with language thrown in as a bonus—signaling that transmits information about internal states, not just crude signals such as ‘predator here’ or ‘food there.’"

“The first rule of space travel...is that mistakes are fatal. Space isn’t friendly; it kills you. And there are no second chances.”

“Along the way she’d acquired a powerful conviction that history was a series of accidents—God was either absent or playing a very elaborate practical joke —and that the seeds of evil usually germinated in the footprints of people who knew how everybody else ought to behave and felt the need to tell them so.”

“Yup, that pretty much confirms the diagnosis. This is the desk of a diseased mind, hugely ambitious, prone to taking insanely dangerous risks. He’s not ashamed of boasting about it—he clearly believes in better alpha-primate dominance displays through carpentry.”

“One of the great besetting problems of the modern age is what to do with too much information.”

“It’s all he can do to refrain from prayer. God probably doesn’t want to know what he’s doing here this morning, a borderline accomplice to evil in service to a greater cause.”

“People didn’t always follow their best interests. Human beings were distressingly bad at risk analysis, lousy with hidden motivations and neuroses, anything but the clean rational actors that economists or diplomats wanted so desperately to believe in, and diplomats had to go by capabilities, not intentions.”