“There was no doubt now in Ender's mind. There was no help for him. Whatever he faced, now and forever, no on ewould save him from it. Peter might be scum, but Peter had been right, always right; the power to cause pain is the only power that matters, the power to kill and destroy, because if you can't kill then you are always subject to those who can, and nothing and no one will ever save you.”

“because if you can’t kill then you are always subject to those who can, and nothing and no one will ever save you.”

“From this moment on, nothing is what it seems. You're not a human being, you're a character- and filmmakers are doing everything in their power to kill you even now. Supernatural powers and curses are real, and numbers like 666 and 237 can kill you just as easily as a butch knife.Log cabins are slaughterhouses, cornstalks are antennas for evil, and aliens never, ever come in peace.”

“He had been contemptuous of those who wrecked. You did not have to like it because you understood it. He could beat anything, he thought, because no thing could hurt him if he did not care.All right. Now he would not care for death. One thing he had always dreaded was the pain. He could stand pain as well as any man, until it went on too long, and wore him out, but here he had something that had hurt frightfully and just when he had felt it breaking him, the pain had stopped.”

“How obvious it is now--the gift you gave him. All those letters, they were you... All those beautiful powerful words, they were you!.. The voice from the shadows, that was you... You always loved me!" Roxanne”

“An enemy, Ender Wiggin," whispered the old man. "I am your enemy, the first one you've ever had who was smarter than you. There is no teacher but the enemy. No one but the enemy will tell you what the enemy is going to do. No one but the enemy will ever teach you how to destroy and conquer. Only the enemy shows you where you are weak. Only the enemy tells you where he is strong. And the rules of the game are what you can do to him and what you can stop him from doing to you. I am your enemy from now on. From now on I am your teacher.”