“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.”

“Welcome to the human race. Nobody controls his own life, Ender. The best you can do is choose to fill the roles given you by good people, by people who love you.”

“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.”

“Individual human beings are all tools, that the others use to help us all survive.” “That’s a lie.” “No. It’s just a half truth. You can worry about the other half after we win this war.”

“Others find humanity by looking in their own hearts. Only lost souls need to search for it outside themselves.”

“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.”