LitCharts assigns a color and icon to each theme in The Sun is Also a Star, which you can use to track the themes throughout the work.
Immigration and the American Dream
Passion vs. Reason
Interconnectedness and Destiny
Isolation vs. Connection
Summary
Analysis
Natasha thinks about the coming winter when Daniel emerges from the building. He has a grim look as he approaches Natasha and tells her he loves her in a tone that tells Natasha he means it. Natasha is confused, and when her phone rings, Daniel tells her to not answer it. It's Attorney Fitzgerald. Daniel tells Natasha she can't stay, and her stomach sinks. Daniel tries to comfort her, but she makes him tell her exactly what happened first. After he tells her what Fitzgerald said about her deportation, Natasha listens to her voicemail. She wants the world to stop.
When Daniel tells Natasha himself about the deportation, he ensures that she's going to hear the news from someone who actually cares about her and has a truly intimate connection with her—not from a clearly distracted and disinterested attorney. In turn, this shows that there are significant differences between the cosmic interconnectedness of the world and the intimate connections people form, and suggests the latter is better.
Active
Themes
Daniel writes a poem about how hearts don't break, since they're not made of a hard material that can splinter or shatter. Instead, they just stop working.
Notably, while Daniel's shifted perspective is still poetic, it shows a more scientific assessment of how hearts work—an indication of Natasha’s impact on him.