Cassandra Clare said this quote

And she wept as well for the others lost in the Dark War, and she wept for her mother and the loss she had endured, and she wept for Emma and the Blackthorns, remembering how they had fought back tears when she had told them that she had seen Mark in the tunnels of Faerie, and how he belonged to the Hunt now, and she wept for Simon and the hole in her heart where he had been, and the she would miss him every day until she died, and she wept for herself and the changes that had been wrought in her, because sometimes even change for the better felt like a little death.