“What else should you be? Human beings didn't evolve brains in order to lie around on lakes. Killing's the first thing we learned. And a good thing we did, or we'd be dead, and the tigers would own the earth.”

“Human beings are free except when humanity needs them. Maybe humanity needs you. To do something. Maybe humanity needs me—to find out what you're good for. We might both do despicable things, Ender, but if humankind survives, then we were good tools.”

“As a species, we have evolved to survive. And the way we do it is by straining and straining and, at last, every few generaitons, giving brith to genius. The one who invents the wheel. And light. And flight. The one who builds a city, a nation, an empire...I'll put it bluntly. Human beings are free excpet when humanity needs them. Maybe humanity needs you. To do something. Maybe humanity needs me - to find out what you're good for.”

“I didn't know that empty rationalization was part of your programming," said Ram. "We would not be fit companions for human beings without it.”

“Human beings may be miserable specimens, in the main, but we can learn, and, through learning, become decent people.”

“Then you're dead, too, sweet little sister.'Oh, yes,' said Valentine. 'They'll believe that. "I didn't know it would kill Andrew. And when he was dead, I didn't know it will kill Valentine too.”

“So from then on, he looked at all his choices and said, What would a good person do, and then did it. But he has now learned something very important about human nature. If you spend your whole life pretending to be good, then you are indistinguishable from a good person. Relentless hypocrisy eventually becomes the truth.”