The allegory of Linda is very clear here: she is the "keeper" of lawful society. As the agent of unifying government she remains herself "above the shames and passions" of those she governs. But her "jealousy," on the surface referring to Nostromo and Giselle only, grammatically can refer to all the "passions of the earth," suggesting that repressive law, removed as it is from all the emotions of the truly human, is jealous and "alone."