“One has to understand what the enemy is all about: the enemy's history, the enemy's culture, the enemy's aspirations. If you understand these well, you can perhaps move towards peace.”

“The beginning of all wisdom is to understand that you don't know. To know is the enemy of all learning. To be sure is the enemy of wisdom.”

“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.”

“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.”

“To destroy the enemy it can be necessary to understand him.”

“Give your enemy a face, If he is human, do not dehumanize him. Know him and know why he is your enemy. If your enemy is within you, understand what it is and why you are afraid. Put a face on your fear. When you understand it, and it is no longer vague and shapeless, you will find that your fear is no longer so formidable.”