Soldiers can sometimes make decisions that are smarter than the orders they've been given.

it was all your genes that made us geniuses, mom. said peter. we sure didn't get any from dad. i heard that. father said, not looking up from the news that was being displayed on the table while he ate it would've been wasted if you hadn't

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.

At last he came to a door, with these words in glowing emeralds: THE END OF THE WORLD He did not hesitate. He opened the door and stepped through.

To have a choice at all is to be free - even when the choice is between two terrible things.

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

With life. Rooter says that life is how God gives purpose to the universe.