The idea of Jeannette marrying across class lines is categorically excluded by everyone: Madame Lamiens, unaware of her noble status, can’t imagine Jeannette marrying her social betters, and fortune is imagined as actively intervening to prevent her from being married to a man of inferior status. And Jeannette’s inherent nobility of spirit, despite her lowly social status, is part of the reason that Jacques falls in love with her. His suffering is a stereotypical example of lovesickness, in which excessive, unrequited love makes a person physically ill—note that his parents call doctors to his bedside. This is one of the occasional moments where fortune takes on the power of divine will, and it also recalls the idea of fortune’s wheel—Jeannette’s inherent nobility attracts Jacques, and this will be the means by which she’s saved from the horrible situation her family was thrown into when her father’s inherent nobility attracted the affections of the French Princess.