Space
The Anthroposopher Sanderson explains to the guests in Worlds Apart that "Our idea of space as a vast empty container, like the inside of a packing case, is really quite artificial.  . . . it was simply the first impression which a newly-awakened, brain-focused thinking had of its situation in the universe. For the first time it realized itself as a centre in the fullest possible sense of the word. That is why the study of perspective only began at about the same time as the scientific revolution . . . " (136).
 
See in particular Worlds Apart, passim.