Jack Shephard: Are you real?
Christian Shephard: I sure hope so. Yeah, I'm real. You're real. Everything that's happened to you is real. All those people in the church, they're all real too.
Jack Shephard: No. They're all... They're all dead. I'm dead. You're dead.
Christian Shephard: Everyone dies sometime, kiddo. Some of them before you, some... long after you.
Jack Shephard: But why are they all here now?
Christian Shephard: Well, there is no "now", here.
Jack Shephard: Where are we, Dad?
Christian Shephard: This is a place that you... that you all made together so that you could find one another. The most important part of your life was the time that you spent with these people on that island. That's why all of you are here. Nobody does it alone, Jack. You needed all of them, and they needed you.
Jack Shephard: For what?
Christian Shephard: To remember. And to... let go.
Jack Shephard: Kate... She said we were leaving.
Christian Shephard: Not leaving. No. Moving on.
Jack Shephard: Where are we going?
Christian Shephard: Let's go find out.
Jack Shephard: You're not John Locke. You disrespect his memory by wearing his face, but you're nothing like him. Turns out he was right about most everything. I just wish I could have told him that while he was still alive.
Miles Straume: I don't believe in a lot of things, but I do believe in duct tape.
Jack Shephard: Desmond, you've done enough. You wanna do something? Go home and be with your wife and son.
Desmond Hume: How about *you*, Jack?
Jack Shephard: I'll see you in another life, brother.
[last line of the series]
John Locke: [to Jack] We've been waiting for you.
[Locke has just remembered his time on the island after Jack healed his legs]
John Locke: Jack... I hope that somebody does for you... what you just did for me.
Miles Straume: Looks like you got your first gray hair. What are you smiling about?
Richard Alpert: I think I just realized that I want to live.
Miles Straume: It's good timing.
James 'Sawyer' Ford: [after his food gets stuck in a vending machine, Juliet catches him reaching into it] It's okay, I'm a cop.
Juliet Burke: Then why don't you read the machine its rights?
Ben Linus: [on walkie-talkie] Frank? How's it going over there? What's your timetable?
Frank Lapidus: [yells] Don't bother me!
Ben Linus: Sounds like they're making progress.
John Locke: I want you to know, Jack, you died for nothing!