Leonard Shelby: We don't need mirrors to remind ourselves who we are. I'm no different.
Leonard Shelby: I have to believe in a world outside my own mind. I have to believe that my actions still have meaning... even if I can't remember them. I have to believe that when my eyes are closed, the world's still there.
Leonard Shelby: These tracks are just a few days old. Teddy: What are you, Pocahontas?
Leonard Shelby: I don't think they let people like me carry guns. Teddy: I fuckin' hope not.
Leonard Shelby: She's gone and the past is trivia that I scribble on these fucking notes.
Natalie: What's the last thing you do remember? Leonard Shelby: My wife... Natalie: That's sweet. Leonard Shelby: ...dying.
[last line] Leonard Shelby: Now... where was I?
Leonard Shelby: I always thought the joy of reading a book is not knowing what happens next.
Leonard Shelby: [thinking about his wife] How can I remember to forget you?
Teddy: You don't know who you are anymore. Leonard: Of course I do. I'm Leonard Shelby. I'm from San Francisco. Teddy: No, that's who you were! Maybe it's time you started investigating yourself.
[Finding a beaten man in his closet.] Leonard: Who did this to you? Dodd: You did.
Leonard: The world doesn't just disappear when you close your eyes, does it?
Teddy: It's beer o'clock, and I'm buying.
[Discovering he's holding a half-empty bottle of whiskey.] Leonard Shelby: I don't... feel drunk.
Leonard Shelby: We all have nightmares to remind ourselves who we really are.
Teddy: Ya know, I've had more rewarding relationships... but at least I can keep telling the same jokes.
Leonard Shelby: Memory can change the shape of a room; it can change the color of a car. And memories can be distorted. They're just an interpretation, they're not a record, and they're irrelevant if you have the facts.
[Leonard's memory blanks and he finds himself running.] Leonard Shelby: Okay, so what am I doing? [Glimpses Dodd running parallel to him through rows of cars.] Oh, I'm chasing this guy. [Dodd stops, pulls out a gun and points it at Leonard.] No... he's chasing me.