Aw, Poke, you poor, kind, decent, stupid girl. You saved me and I let you down.

The future is a hundred thousand threads, but the past is a fabric that can never be rewoven.

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.

the seed of doubt was there, and it stayed, and every now and then sent out a little root. It changed everything, to have that seed growing. It made Ender listen more carefully to what people meant, instead of what they said. It made him wise.

Any decent person who knows what warfare is can never go into battle with a whole heart.

If human beings are all monsters, why should I sacrifice anything for them?" "Because they are beautiful monsters..., And when they live in a network of peace and hope, when they trust the world and their deepest hungers are fulfilled, then within that system, that delicate web, there is joy. That is what we live for, to bind the monsters together, to murder their fear and give birth to their beauty.

Isn't it possible, he wondered, for one person to love another without trying to own each other? Or is that buried so deep in our genes that we can never get it out? Territoriality.