Jeannie's Diary by Eels is a melancholic exploration of unrequited love and longing. The song delves into the narrator's fascination with Jeannie, conveyed through reading her diary. It reflects themes of desire, isolation, and the intimate pain of loving someone from afar. Poignant moments include the narrator's realization of the depth of Jeannie's thoughts and feelings, highlighting the stark contrast between his emotional world and her perceived indifference.