Dick: I have spent my entire life as a human on the outside looking in. Always trying, approximating, attempting, but never being a human being.
Sally: That's 'cause you're not.
Dick: Lieutenant, I refuse to be defined by who I am. My past has always gotten me into trouble. As of now, I have no past. I am no longer an alien.
Sally: What?
Dick: From now on, I am a human being. I am John Q. Pubic.