What does maes music box symbolize and why?

Maes music box plays a melody that calms the infected in the game The Last of Us Part II. It symbolizes hope, beauty and the power of music. Maes music box is named after Joel's daughter who died before the events of the first game. The music symbolizes Joels love for his daughter and the music box is his reminder of the beauty of the world before she died. It also symbolises the hope and peace that can be found even in the darkest of times.