Lindsey: We are dealing with a bona fide case of mistaken identity here.
Slevin: Yeah.
Lindsey: Things like that aren't supposed to be real. It's like amnesia.
Lindsey: Not withstanding, here you are and Nick's nowhere to be found, so... I'd say you're fucked.
Slevin: Fucked.
Lindsey: Shouldn't you be a little more worried about all this?
Slevin: I have ataraxia.
Lindsey: Ataraxia?
Slevin: It's a condition characterized by freedom from worry or any other preoccupation, really.