"Vampires can’t exist. There’d be detailed records in the archives; they couldn’t possibly evade detection by the state for any significant period. Besides which...there’d be corpses everywhere. Human blood is a poor nutrient source; it’s about 60 percent plasma by volume and only provides about 900 calories per liter, so your hypothetical blood-sucking fiend is going to have to drink about two and a half liters per day. Those calories don’t come in the form of useful stuff like glucose and fat: it’s mostly protein from circulating red blood cells. Dracula would have to exsanguinate a victim every day just to stay alive, and would suffer from chronic ketoacidosis. The total number of intentional homicides for the whole country is around 700 a year; a single vampire would cause a 50 percent spike in the murder rate. Or they’d have to take transfusion-sized donations about two thousand times a year."

“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.”