Batty: Quite an experience to live in fear, isn't it? That's what it is to be a slave.
Tyrell: [Tyrell explains to Roy why he can't extend his lifespan] The facts of life... to make an alteration in the evolvement of an organic life system is fatal. A coding sequence cannot be revised once it's been established.
Batty: Why not?
Tyrell: Because by the second day of incubation, any cells that have undergone reversion
mutation give rise to revertant colonies, like rats leaving a sinking ship; then the ship... sinks.
Batty: What about EMS-3 recombination?
Tyrell: We've already tried it - ethyl, methane, sulfinate as an alkylating agent and potent mutagen; it created a virus so lethal the subject was dead before it even left the table.
Batty:
Then a repressor protein, that would block the operating cells.
Tyrell: Wouldn't obstruct replication; but it does give rise to an error in replication, so that the newly formed DNA strand carries with it a mutation - and you've got a virus again... but this, all of this is academic. You were made as well as we could make you.
Batty: But not to last.
Tyrell: The light that burns twice as bright burns half as long - and you have burned so very, very brightly, Roy. Look at you: you're the Prodigal Son; you're quite a prize!
Batty: I've done... questionable things.
Tyrell: Also extraordinary things; revel in your time.
Batty: Nothing the God of
biomechanics wouldn't let you into heaven for.
Deckard: [narrating] I don't know why he saved my life. Maybe in those last moments he loved life more than he ever had before. Not just his life - anybody's life; my life. All he'd wanted were the same answers the rest of us want. Where did I come from? Where am I going? How long have I got? All I could do was sit there and watch him die.
Holden: You're in a desert, walking along in the sand, when all of a sudden you look down...
Leon: What one?
Holden: What?
Leon: What desert?
Holden: It doesn't make any difference what desert, it's completely hypothetical.
Leon: But, how come I'd be there?
Holden: Maybe you're fed up. Maybe you want to be by yourself. Who knows? You look down and see a tortoise, Leon. It's crawling toward you...
Leon: Tortoise? What's that?
Holden: [irritated by Leon's interruptions] You know what a turtle is?
Leon: Of course!
Holden: Same thing.
Leon: I've never seen a turtle... But I understand what you mean.
Holden: You reach down and you flip the tortoise over on its back, Leon.
Leon: Do you make up these questions, Mr. Holden? Or do they write 'em down for you?
Holden: The tortoise lays on its back, its belly baking in the hot sun, beating its
legs trying to turn itself over, but it can't. Not without your help. But you're not helping.
Leon: [angry at the suggestion] What do you mean, I'm not helping?
Holden: I mean: you're not helping! Why is that, Leon?
[Leon has become visibly shaken]
Holden: They're just questions, Leon. In answer to your query, they're
written down for me. It's a test, designed to provoke an emotional response... Shall we continue?
Batty: Yes!
[smiles]
Batty: Questions... Morphology? Longevity? Incept dates?
Hannibal Chew: Don't know, I don't know such stuff. I just do eyes, ju-, ju-, just eyes... just genetic design, just eyes. You Nexus, huh? I design your eyes.
Batty: Chew, if only you could see what I've seen with your eyes!
Rachael: Do you like our owl?
Deckard: It's artificial?
Rachael: Of course it is.
Deckard: Must be expensive.
Rachael: Very.
Rachael: I'm Rachael.
Deckard: Deckard.
Rachael: It seems you feel our work is not a
benefit to the public.
Deckard: Replicants are like any other machine - they're either a benefit or a hazard. If they're a benefit, it's not my problem.
Deckard: She's a replicant, isn't she?
Tyrell: I'm impressed. How many questions does it usually take to spot them?
Deckard: I don't get it, Tyrell.
Tyrell: How many questions?
Deckard: Twenty, thirty, cross-referenced.
Tyrell: It took more than a hundred for
Rachael, didn't it?
Deckard: [realizing Rachael believes she's human] She doesn't know.
Tyrell: She's beginning to suspect, I think.
Deckard: Suspect? How can it not know what it is?
Rachael: That Voight-Kampf test of yours. Have you ever tried to take that test yourself?
Deckard: Leon!
Leon: How old am I?
Deckard: [after slugging Leon, to no effect] I dunno.
Leon: My birthday is April 10, 2017. How long do I live?
Deckard: Four years.
Leon: More than you! Painful to live in fear, isn't it?
Leon: [going to
kill Deckard] Wake up! Time to die!