What does Luna mean when ze says “being sad was too tiring so I stopped”? Lots of people in real life find it very tiring to be sad, and would love to stop, but can't.
Luna's description doesn't quite let us understand what happened. Ze's only trying to explain what ze felt as well as ze can. It's hard to describe subjective experiences, especially when your language evolved in a neurelitist society that assumes human emotions are universal.