In "Unsheltered" by Barbara Kingsolver, the protagonist grapples with the consequences of his life choices and emotions. The phrase "spider jealousy" suggests a deep-seated, almost irrational envy that can entrap a person, much like a spider weaving its web. This highlights how one's life can spiral downward, leading to feelings of inadequacy and jealousy towards others.

Thatcher reflects on the severity of such emotions and how they signify a personal downfall. This introspection speaks to broader themes of existential crisis and the struggle to find meaning in one's life amidst turmoil. It emphasizes how emotional struggles can overshadow our better judgments and relationships.