NARRATOR: With insomnia nothing's real. […] Everything's a copy of a copy of a copy.
What happens when you make multiple copies? Things start to get weird. They get blurry and off-center, and they're nothing like the original. That's what's happening to the narrator's world here, and notice how he's already hallucinating. Tyler Durden blinks into existence near the copy machine for a split second and disappears as he says this.
NARRATOR: I nod off. I wake up in strange places, and I have no idea how I got there.
No, this isn't normal. It's almost like he could be doing other things while he's asleep and completely forgetting about them…
NARRATOR: When you have insomnia you're never really asleep and you're never really awake.
Fight Club is basically one big sleepwalking movie. Or maybe a warning against the dangers of Ambien.
NARRATOR: If you wake up at a different time, in a different place, could you wake up a different person?
Our narrator isn't just thinking out loud here, he's actually telling us exactly what happens. The meaning behind this is enforced by the fact that he passes Tyler Durden on the moving walkway at the airport as he says this.
NARRATOR: Supposedly, he was born in a mental institution, and he sleeps only one hour a night.
Okay, only half this statement we know is true, although even a whole hour of sleep sounds like an overestimate. Would you be surprised if our main character actually was born in a mental institution?
BOB: Do you know about Tyler Durden?
This question is worded differently than you'd expect. It's not, "Do you know Tyler Durden?" which we've heard asked before, but do you know about him? As in, does our narrator know that he is Tyler Durden?
NARRATOR: Tyler isn't here. Tyler went away. Tyler's gone.
Our narrator is talking to Marla here. Once you know that he is actually Tyler Durden, he looks like a total crackpot, or one of those idiots who refers to himself in the third person…or both.
NARRATOR: Is Tyler my bad dream, or am I Tyler's?
By the end of the movie, it's difficult to tell who our real narrator is. Is he more himself (whoever that may be) or is he more "Tyler"?
NARRATOR: Everywhere I went, I felt I'd already been there.
His weird sense of déjà vu comes from the fact that he has already been there. All the places Tyler has traveled are places he too has traveled thanks to his job and the fact that he is Tyler.
NARRATOR: You met me at a very strange time in my life.
This is a succinct way of saying "You met me while I was having an insane dissociative identity experience." Good thing Marla thinks he's cute.