Thanks from keeping me from being a liar," said Nikolai.
"What?"
"About your having diarrhea."
"For you I'd get dysentery."
"Now that's friendship.

Once you get a brother, you don’t give him up easy.

...the thing with brothers is, you're supposed to take turns being the keeper. Sometimes you get to sit down and be the brother who is kept.

I would carry some of it if I could, Bean said silently. Like I did today, you can turn it over to me and I’ll do it, if I can. You don’t have to do this alone.

Only even as he thought this, Bean knew it wasn’t true. If it could be done, Ender was the one who would have to do it. All those months when Bean refused to see Ender, hid from him, it was because he couldn’t bear to face the fact that Ender was what Bean only wished to be — the kind of person on whom you could put all your hopes, who could carry all your fears, and he would not let you down, would not betray you.

I want to be the kind of boy you are, thought Bean. But I don’t want to go through what you’ve been through to get there.

What I want," he said softly, "is to stand in this meadow and walk in the light of the sun.

The criminal misuse of time was pointing out the mistakes. Catching them―noticing them―that was essential. If you did not in your own mind distinguish between useful and erroneous information, then you were not learning at all, you were merely replacing ignorance with false belief, which was no improvement. The part of the man's statement that was true, however, was about the uselessness of speaking up. If I know that the teacher is wrong, and say nothing, then I remain the only one who knows, and that gives me an advantage over those who believe the teacher.