"I can't trust anyone."
"Not even me?"
"Not your judgment, Johnny. You are new to Earth."
"Not new, Ash. I know Earth and Earthmen. Much better than you know them. You're not the first Earthman I've lived with."
"I can't remember, Johnny. There's something to remember. I try to remember it and there's nothing but a blur. The big things, of course, the things I learned, the things I wrote down and took away. But not the place itself or the people in it."
"They aren't people, Ash."
"I know. I can't remember."
''You're not supposed to, Ash. It was all too alien. You can't carry such memories with you…you shouldn't carry such alien memories, for when you carry them too closely, you are a part of them. And you had to stay human, Ash. We have to keep you human."
"But someday I must remember. Someday…"
"When you must remember them, you will remember them. I will see to that."