The goddess Fortune is mad, blind, and stupid, some philosophers maintain. They declare that she stands upon a revolving globe of stone; whither Chance impels this stone, thither, they say, does Fortune fall. She is blind, they repeat, for that she fails wholly to perceive whereto she attaches herself. Moreover they declare that she is mad because she is cruel, uncertain, and inconstant; stupid because she knows not how to tell worthy from unworthy.