How we cite our quotes: All quotations are from Sabrina.
Quote #4
LINUS: Why're you looking at me that way?
SABRINA: All night long I've had the most terrible impulse to do something.
LINUS: Oh, never resist an impulse, Sabrina, especially if it's terrible.
SABRINA: I'm gonna do it.
SABRINA: [reaching out and turning down the brim of Linus' Homburg] There!
LINUS: What's that for?
SABRINA: We can't have you walking up and down the Champs Elysees looking like a tourist undertaker! Another thing, never a briefcase in Paris and never an umbrella. There's a law.
Going to Paris is not just going to Paris; it's becoming the sort of person who can be in Paris. That means that Linus, when in Paris, will no longer be a "tourist undertaker", but will instead turn into someone who wears his hat stylishly. And, of course, in seeing Linus as someone who could live in Paris, Sabrina sees him as someone romantic (or capable of romance at least.)
Quote #5
DAVID: Funniest thing. Linus Larrabee, the man who doesn't burn, doesn't scorch, doesn't melt... suddenly throws a twenty million dollar deal out the window.
[stops at the door]DAVID: Are you sure you don't want to go with her?
LINUS: Why should I want to go with her?
DAVID: Because you're in love with her.
If Linus goes to Paris with Sabrina, he'll be admitting he loves her. So Paris becomes the symbol of love; it's literally where you go to be in love. Otherwise you stay in dull New York adding up figures, and where's the fun in that?