Invisibility isn't a quality of the object

"There are no invisible objects of perception," she replies. "Invisibility isn't a quality of the object. It is a quality, a capacity, an incapacity, of the observer. I call the soul invisible if I can't see it. That says something about me. It says nothing about the soul."

J.M. Coetzee, 'The Old Woman and the Cats' in Cripplewood (Yale University Press, 2013) p.10