“And it occurred to me that what we professors think of as a 'brilliant student' is nothing but a student who is enthusiastically converted to whatever idiotic ideas we've been teaching them.”

“You know what I was thinking? [Ruthie] got so excited when she was spouting this ahistorical countertextual nonsense, and I caught myself thinking, 'What an idiot her teacher must be,' and thinking about her teacher made me realize - the kind of excitement she was showing as she mindlessly spouted back the nonsense she learned in college, that's just like the excitement some of my own students show. And it occurred to me that what we professors think of as a 'brilliant student' is nothing but a student who is enthusiastically converted to whatever idiotic ideas we've been teaching them.""Self-knowledge is a painful thing," said Esther. "To learn that your best students are parrots after all.”

“I tell students that suspense comes, not from knowing almost nothing, but from knowing almost everything and caring very much about the small part still unknown.”

“Quim," she said, "don't ever try to teach me about good and evil. I've been there, and you've seen nothing but a map.”

“...you seemed to be listening to me, not to find out useful information, but to try to catch me in a logical fallacy. This tells us all that you are used to being smarter than your teachers, and that you listen to them in order to catch them making mistakes and prove how smart you are to the other students. This is such a pointless, stupid way of listening to teachers that it is clear you are going to waste months of our time before you finally catch on that the only transaction that matters is a transfer of useful information from adults who possess it to children who do not, and that catching mistakes is a criminal misuse of time.”

“I had no idea we planned to be so ruthless.""It was not publicized or even discussed with the political arm of the colonization program. Ruthlessness was necessary but wins no votes.""But this is not our world, to treat however we want!""Visiting here as students of an alien evolutionary tradition would not be either cost-effective or, ultimately, successful. We would inevitably contaminate Garden, or worse yet, become contaminated and bring potentially deadly Gardenian life forms back to Earth. The three continental preserves will be sufficient to allow biologists to study alien life at some point in the future. And if you really thought we would colonize this world without making it 'ours', you'd be far too naive to command this expedition.""I...didn't realize...""You didn't think about it at all," said the expendable. "The selective voluntary blindness of human beings allows them to ignore the moral consequences of their choices. It has been one of the species' most valuable traits, in terms of the survival of any particular human community.""And you aren't morally blind?""We see the moral ironies very clearly. We simply don't care.”

“Everything we do means something, Ender realized. Them laughing. Me not laughing. He toyed with the idea of trying to be like the other boys. But he couldn’t think of any jokes, and none of theirs seemed funny. Wherever their laughter came from, Ender couldn’t find such a place in himself.”