Quote from Kramer in The Serenity Now
Jerry: Patty won't call me back. I don't know if I can live without her. Kramer: She's really gotten to you, hasn't she? Jerry: I don't know what's happening to me. Kramer: Simple. You let out one emotion, all the rest will come with it. It's like Endora's box. Jerry: That was the mother on Bewitched. You mean Pandora. Kramer: Yeah, well, she had one, too.