“[That wall] might be breached sometime in the future, but for now the only real conversation between them was the roots that had already grown low and deep, under the wall, where they could not be broken.The most terrible thing, though, was the fear that the wall could never be breached, that in his heart Alai was glad of the separation, and was ready to be Ender's enemy. For now that they could not be together, they must be infinitely apart, and what had been sure and unshakable was now fragile and insubstantial; from the moment we are not together, Alai is a stranger, for he has a life now that will be no part of mine, and that means that when I see him we will not know each other.”

“We were enemies to the core, more so now than ever, but my loss was his. When I suffered, he suffered. It was the way we were built, and even the death that he had indirectly caused couldn't breach that or shatter what lay between us.Nothing could.”

“But I feel separated now, as though a clear thin wall rises up distinctly between myself and those staring at me. We can see each other, but we can't cross over.”

“All his life had been based on this hostile kind of strength; a strength that viewed the world as a thing to master, to overcome, to fight. As a problem that might be solved by destroying. It seemed faintly ridiculous to him now; and he found it difficult to remember that a life could be based on such fear. There could, he thought , be no impulse to destruction that was not rooted in some terrible fear, and he was no longer afraid.”

“They had no conversation together, no intercourse but what the commonest civility required. Once so much to each other! Now nothing! There had been a time, when of all the large party now filling the drawing-room at Uppercross, they would have found it most difficult to cease to speak to one another. With the exception, perhaps, of Admiral and Mrs. Croft, who seemed particularly attached and happy, (Anne could allow no other exception even among the married couples) there could have been no two hearts so open, no tastes so simliar, no feelings so in unison, no countenances so beloved. Now they were as strangers; nay, worse than strangers, for they could never become aquainted. It was a perpetual estrangement.”

“How little we knew each other, though for centuries our homes had shared walls. How little we will learn, now that all we share is a border.”