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 introduces Daniel as a friend, and Patricia eyes him. Daniel looks around the living room and realizes that it's Natasha's bedroom as well. Peter introduces himself with a huge smile as Patricia tries to get Natasha to go to the other room. Natasha insists they can talk in front of Daniel, since he's her boyfriend. At just that moment, Samuel, a deep frown on his face, walks out of the bedroom. Daniel struggles to understand his accent, but he's clearly angry that Natasha has been gone all day.
Peter's smile and openness towards Daniel suggests that the two have more in common than Natasha might have let on when she mentioned that Peter was a "non-dreamer." Again, this illustrates the novel's assertion that while everyone is basically connected, intimate and close connections can be found anywhere.
Active
Themes
Daniel sees hurt, anger, and disbelief on Natasha's face as she turns to Samuel. Natasha tells her dad she spent her day trying to fix his mistakes and keep the family in the country. Daniel nods when Samuel asks if he knows the situation. Samuel tells Natasha that Daniel needs to leave, since it's not his house. Natasha, even angrier, takes issue with this. She backs down when Patricia asks her to, but Samuel wants to hear what Natasha has to say.
When Samuel asks Natasha to share what she has to say, it appears to be the first time that he's leveling with her like an adult. This will bring about a fundamental shift in their relationship and make it one more of equals, something Daniel wasn't able to achieve with his own father.