Nobody ever completely means what they say. Even when they think they're telling the truth, there's always something hidden behind their words.

If you give orders and explain nothing, you might get obedience, but you'll get no creativity. If you tell them your purpose, then when your original plan is shown to be faulty, they'll find another way to achieve your goal. Explaining to your men doesn't weaken their respect for you, it proves your respect for them.

Because never in my entire childhood did I feel like a child. I felt like a person all along―the same person that I am today.

So the whole war is because we can't talk to each other.

Be proud, Bonito, pretty boy. You can go home and tell your father, Yes, I beat up Ender Wiggin, who was barely ten years old, and I was thirteen. And I had only six of my friends to help me, and somehow we managed to defeat him, even though he was naked and wet and alone--Ender Wiggin is so dangerous and terrifying it was all we could do not to bring two hundred.

The difference between science fiction and fantasy … is simply this: science fiction has rivets and fantasy has trees.

The Buggers have finally, finally learned that we humans value each and every individual human life. But they've learned this lesson just in time for it to be hopelessly wrong — for we humans do, when the cause is sufficient, spend our own lives. We throw ourselves onto the grenade to save our buddies in the foxhole. We rise out of the trenches and charge the entrenched enemy and die like maggots under a blowtorch. We strap bombs on our bodies and blow ourselves up in the midst of our enemies. We are, when the cause is sufficient, insane.