‘You’re predators. So you think being a predator is fine. Well, we think being parasites is fine,’ Karen said, smirking. 'Your morality is real simple. Anything humans do is okay, anything Yeerks do is wrong.’
Marco was mostly human now. Human enough to speak and to jab his finger angrily at Karen. 'Hey, Slug-girl, we didn’t start this fight, you did. We didn’t go to the Yeerk planet and start killing Yeerks. You started this war.’
'Who started the war between humans and cows? Or humans and pigs? Or humans and chickens?’ Karen demanded, laughing derisively. 'Cows weren’t eating humans, were they?’
'Hey, we’re not cows,’ Marco snapped. 'You can’t compare what you do to humans with what we do to cows.’
'Sure I can. You’re our meat!’ Karen said.
Book #19: The Departure, pg. 96 (by K.A. Applegate)