He could see Bonzo's anger growing hot. Hot anger was bad. Ender's anger was cold, and he could use it. Bonzo's was hot, and so it used him.

Maybe we're the fools, for thinking we know things. Maybe humans are the only ones who can deal with the fact that nothing can ever be known at all.

In war, everyone has their chance to bleed.

I think that most of us, anyway, read these stories that we know are not "true" because we're hungry for another kind of truth: the mythic truth about human nature in general, the particular truth about those life-communities that define our own identity, and the most specific truth of all: our own self-story. Fiction, because it is not about someone who lived in the real world, always has the possibility of being about oneself. --From the Introduction

I don't care if I pass your test, I don't care if I follow your rules. If you can cheat, so can I. I won't let you beat me unfairly - I'll beat you unfairly first. - Ender

So let me tell you what I think about gods. I think a real god is not going to be so scared or angry that he tries to keep other people down…A real god doesn’t care about control. A real god already has control of everything that needs controlling. Real gods would want to teach you how to be just like them.

I taught you everything you know. But I didn't teach you everything I know.