Thought (Camille Claudel) By auguste rodin?

I am doing a french project for school, and i was wondering why Thought (Camille Claudel) sculpted by Auguste Rodin looks unfinished, and, is it truly unfinished? here is a link to a picture of it: a href="http://search.live.com/images/results.aspx?q=Thought%20(Camille%20Claudel)&FORM=BIRE#focal=d39d58cfca22e445826bc9eeb2868f25&furl=http%3A%2F%2Fwww.musee-rodin.fr%2Fimages%2Fimagra%2FPh636.jpg" rel="nofollow"http://search.live.com/images/results.as…/a