“He was born with a weakness he didn't know about.”
“... he tried to visualise her apartment, but he couldn't do it, he didn't know enough about her.”
“He didn't like to be seen needing it - as if hunger were a sign of weakness.”
“Ender didn't like fighting. He didn't like Peter's kind, the strong against the weak, and he didn't like his own kind either, the smart against the stupid.”
“When she was younger, she felt that he wanted to know everything about her, but she was sometimes afraid to tell too much. She was afraid he would know her too well, that he would find some weakness in her, some element that would turn him away, maybe even a quality she didn't even realize she possessed.”
“He may not have been born with guts, but he didn't have to die without them.”