Jack: What are you DOING HERE!!!!!!

Jack: What are you doing?
Sawyer: Shh I'm like this close to getting the high score on Donkey Kong.

Jack: What did you want to talk to me about, John?
Locke: I want you to reconsider leaving the island, Jack. I would like you to stay.
Jack: You'd like me to stay.
Locke: Yeah. That's right.
Jack: You threw a knife into the back of an unarmed woman, you led half of our people across the island and got most of them killed.
Locke: Well Jack, you put a gun to my head and pulled the trigger. I was hoping we could let bygones be bygones.

Jack: What do you think his story is?
Charlie: Who, Locke? Guy's a freak of nature. Highly disturbed. Chances are he probably killed all his mates at the post office the day his mum forgot to put a cookie in this lunch tin. That was my first impression anyway. Then he saved my life.
Jack: Then you trust him?
Charlie: Trust him? No offense, mate, but if there was one person on this island that I would put my absolute faith in to save us all, it would be John Locke.

Jack: What is that?
Charlie: Claire's diary.
Sayid: You read her diary?
Charlie: Yeah, I know. I'm bloody scum.

Jack: What the hell was all that about back there, John?
Locke: What was what about?
Jack: You asked me to let you go.
Locke: That's right.
Jack: That thing was taking you down the hole and you asked me to let you go.
Locke: It wasn't going to hurt me.
Jack: No, John, it was going to kill you.
Locke: I seriously doubt that.
Jack: Look, I need for you -- I need for you to explain to me what the hell's going on inside your head, John. I need to know why you believe that that thing wasn't going to...
Locke: I believe that I was being tested.
Jack: Tested?
Locke: Yeah, tested.
Jack: I think...
Locke: That's why you and I don't see eye-to-eye sometimes, Jack -- because you're a man of science.
Jack: Yeah, and what does that make you?
Locke: Me, well, I'm a man of faith. Do you really think all this is an accident -- that we, a group of strangers survived, many of us with just superficial injuries? Do you think we crashed on this place by coincidence -- especially, this place? We were brought here for a purpose, for a reason, all of us. Each one of us was brought here for a reason.
Jack: Brought here? And who brought us here, John?
Locke: The island. The island brought us here. This is no ordinary place, you've seen that, I know you have. But the island chose you, too, Jack. It's destiny.
Jack: Did you talk with Boone about destiny, John?
Locke: Boone was a sacrifice that the island demanded. What happened to him at that plane was a part of a chain of events that led us here -- that led us down a path -- that led you and me to this day, to right now.
Jack: And where does that path end, John?
Locke: The path ends at the hatch. The hatch, Jack -- all of it -- all of it happened so that we could open the hatch.
Jack: No, no, we're opening the hatch so that we can survive.
Locke: Survival is all relative, Jack.
Jack: I don't believe in destiny.
Locke: Yes, you do. You just don't know it yet.

Jack: When Juliet told me they were coming, the first thing I thought was: where the hell are we going to hide this time? But hiding's pointless; they're just going to keep coming back, so I went out and I found some help. And for the past few days, she's been bringing dynamite back from the Black Rock. For the very first time, we know exactly what they want, when they're coming to get it and they have no idea. We're going to be waiting for them. So Juliet's going to mark the tents with the white rocks just like she was told to, but there's not going to be any pregnant women inside; there's going to be plenty of what we just used on that tree. So tomorrow night, we stop hiding, we stop running, we stop living in fear of them, because when they show up, we're going to blow them all to hell.

Jack: Why don't you get my father down here? If I'm drunker than he is, then you can fire me!

Jack: You need to put the guns down.
Miles: What?
Jack: Put the guns down.
Miles: Now why would I do that?
Jack: Because our friends are out in the jungle right holding a gun at your head and his head, so I'm gonna forget about the misunderstanding, just put the guns down!
Miles: Come on, how stupid do you think I-
[Several shots ring out, and Juliet and Sayid come out the bushes with guns aimed at Miles and Daniel. Kate grabs Daniel's gun and aims it at him, but Miles continues to hold his]
Jack: I don't know, Miles. How stupid are you?

Jack: You people had therapists?
Juliet: It's very stressful being an Other, Jack.

Jack: You've got hyperopia.
Sawyer: Hyperopia? That's..... What is that?
Jack: You're farsighted.

Jack: [To Kate] I will come back here for you.

Jack:Where were you today?
Ana-Lucia: A lot of places.
Jack: During the rainstorm?
Ana-Lucia: You think I had something to do with Sun getting grabbed? Now where would you get an idea like that?

Jacob: Jack is here because he has to do something. He can't be told what that is, he's got to find it himself. Sometimes you can just hop in the back of someone's cab and tell them what they are supposed to do. Other times you have to let them look at the ocean for a while.

Jacob: That man who told you to kill me believes it is in every person's nature to sin. I bring people here to prove him wrong.
Richard: So you were the one who brought my ship here?
Jacob: Yes,
Richard: And there were other people here before me?
Jacob: Yes, many.
Richard: What happened to them?
Jacob: They're all dead.
Richard: If you brought them here, why didn't you help them?
Jacob: Because I wanted them to help themselves. To know the difference between right and wrong without me having to tell them. It's all meaningless if I have to force them do anything. Why should I have to step in?
Richard: But if you don't he [The Man in Black] will.
Jacob:[Pauses, taken aback] Do you want a job?
Richard: A job? Doing what?
Jacob: Well if I don't want to step in, maybe you could do it for me. You could be my, my representative, an intermediary to me and the people I bring to the Island.
Richard: What would I get in return?
Jacob: You tell me...
Richard: I want my wife back.
Jacob: I can't do that.
Richard: Can you absolve me of my sins?
Jacob: I can't do that either.
Richard: Then I never want to die...I want to live forever.
Jacob:[Smiles, lays a hand on his shoulder] Now that, that I can do.