“Every time, I've won because I could understand the way my enemy though. From what they did. I could tell what they though I was doing, how they wanted the battle to take shape. And I played off of that. I'm very good at that. Understanding how other people think. - Ender Wiggin”

“I'm taking inorganic chem and physics not because I want to but because I have to. Not every doctor wants to be a scientist. Some of us just want to take care of sick people. I can't help thinking that medicine is more closely aligned to the humanities than to the sciences. I can't help thinking that I could learn more about being a good doctor from William Shakespeare than I could from Isaac Newton. After all, isn't understanding people at least as important as understanding pathology?”

“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.”

“And every time I did spectacularly well in my classes, and I'm here to tell you that I did spectacularly well, I could always see the look of surprise on my professors' faces. You don't think I noticed? What you saw on Dave's face, I saw every damned day of my academic career. So what, Andres? I wanted to do something, to be something - and I did it. I don't think I deserve a medal, and I don't think I'm particularly special. I wanted to do something, and I figured out a way to do it.”

“From the moment I saw you, I knew that I wanted you - more than anyone I've ever wanted in a very long time. And I grew to care about you, even though I knew it was foolish. With time, I hoped that you would feel the same way about me, that if I showed you how good it could be between us, you would realize what you were doing, the mistake that you were making. And you were close, I know...”

“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.”