Why would I ever want to stay in this house?' Where she could see precisely how happy they were, where none of them seemed remotely as decimated as she'd been by the war.”
-- Nesta (2 )

Importance: Feyre has issued Nesta the ultimatum to live in the House of Wind where she will train and work, or return to the human realm where she will be hated and feared. Feyre then points out that she invited Nesta to live with her and this is Nesta's response. The reader has never seen deeply into Nesta's thoughts before. This is the first time her inner feelings are revealed and these thoughts make it clear she is hurt, jealous, and afraid, and that these emotions are driving her to lash out.

In the months leading to and during the war, Nesta had managed. Had stepped into this world, with these people, and started to see it...
-- Nesta (chapter 3)