“When your enemy falls to the ground, help him to get up! Never let a man in that condition stay on the ground! To help the weak, be it enemy, be it rival, is an honour for you!”

“I have learned that a man has the right and obligation to look down at another man, only when that man needs help to get up from the ground.”

“That's the way it goes sometimes: in order to help your friends, first you have to help your enemy. Better get used to it.”

“On open ground, do not try to block the enemy's way. On the ground of intersecting highways, join hands with your allies.”

“It's dangerous to let your enemy see weakness. Weakness can git you killed.”

“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.”