You can never go wrong with a classic such as this one. While it's often hard to forget brilliant lines such as "Play it again, Sam." or the old "Of all the gin joints..." quotes. There are other memorable lines from Michael Curtiz's legendary film.
Memorable Casablanca quote:
Rick (Humphrey Bogart)
: “I'm saying it because it's true. Inside of us, we both know you belong with Victor. You're part of his work, the thing that keeps him going. If that plane leaves the ground and you're not with him, you'll regret it. Maybe not today. Maybe not tomorrow, but soon and for the rest of your life.”