Neli: When I said I would never leave you--
Rick: And you never will, but I've got a job to do, too. Where I'm going, you can't follow. What I've got to do, you can't be any part of. I'm no good at being noble, but it doesn’t take much to see that the problems of a man and a dog don't amount to a hill of beans in this crazy world. Someday you'll understand that.
Rick: Now, now... Here's looking at you, pup.
Director: Cut. Something’s not quite right. Let’s try it with the girl. Ilsa?
~Julius J. Epstein, Philip G. Epstein, & Howard Koch, mostly