Mary: Let me ask you something.
[Grabs his hand]
Mary: Why are you alive?
John Preston: [Breaks free] I'm alive… I live… to safeguard the continuity of this great society. To serve Libria.
Mary: It's circular. You exist to continue your existence. What's the point?
John Preston: What's the point of your existence?
Mary: To feel. 'Cause you've never done it, you can never know it. But it's as vital as breath. And without it, without love, without anger, without sorrow, breath is just a clock… ticking.