"Everything about this is embarrassing," she said. "Do you know how embarrassing it is to mention good and evil in scientific laboratory? Have you any idea? One of the reasons I became a scientist was not to have to think about that kind of thing."
"You got to think about it," said Lyra severely. "You can´t investigate Shadows, Dust, whatever it is, without thinking about that kind of thing, good and evil and such."
stana 435, Philip Pullman: Hid Dark Materials (the Subtle Knife)