“There's only one thing that will make them stop hating you. And that's being so good at what you do that they can't ignore you.”

“But when it comes to human beings, the only type of cause that matters is final cause, the purpose. What a person had in mind. Once you understand what people really want, you can't hate them anymore. You can fear them, but you can't hate them, because you can always find the same desires in your own heart.”

“When you really know somebody you can’t hate them. Or maybe it’s just that you can’t really know them until you stop hating them.”

“If they cannot forgive me my foibles, then they are not such good people, no?"..."But they do forgive your foibles. They would welcome your company, too. But if you joined them, you would not understand what they were talking about. You would not have had the experiences that bind them together. You would be an outsider, not because of any act of theirs, but because you have not passed along the road that teaches you to be one of them. You will feel like an exile from the beautiful garden, but it will be you who exiled yourself. And yet you will blame them, and call them judgmental and unforgiving, even as it is your own pain and bitter memory that condemns you, your own ignorance of virtue that makes you a stranger in the land that should have been your home.”

“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.”

“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.”

“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 only 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. I will devise the strategy of your army, and you will learn to be quick and discover what tricks the enemy has for you. Remember, boy. From now on the enemy is more clever than you. From now on the enemy is stronger than you. From now on you are always about to lose.”