“We had been friends. We could not become strangers. It left only one thing: we must be enemies.”

“We danced together. We didn’t look graceful, but how could we? She only had one leg and I had my eyes on her friend the whole night. Sure, her friend couldn’t dance either, and literally had two left feet, but I’ll take two left feet over one left foot any day.”

“We must be what we are, or we become our enemies. ”

“We must not think of the things we could do with, but only of the things that we can't do without.”

“I was remembering the things we had done together, the times we had had. It would have been pleasant to preserve that comradeship in the days that came after. Pleasant, but alas, impossible. That which had brought us together had gone, and now our paths diverged, according to our natures and needs. We would meet again, from time to time, but always a little more as strangers; until perhaps at last, as old men with only memories left, we could sit together and try to share them.”

“[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.”