mental habits had become fixed. Einstein’s ideas, 
     similarly, will seem easier to generations which grow up 
     with them; but for us a certain effort of imaginative 
     reconstruction is unavoidable.

     It is simpler to say that if a new technology extends one or 
more of our senses outside us into the social world, then new 
ratios among all of our senses will occur in that particular 
culture. It is comparable to what happens when a new note is 
added to a melody. And when the sense ratios alter in any 
culture then what had appeared lucid before may suddenly be 
opaque, and what had been vague or opaque will become 
translucent. As Heinrich Wolfflin stated the matter in 1915, in 
his revolutionary Principles of Art History  (p. 62) “the effect is 
the thing that counts, not the sensuous facts.” Wolfflin began 
working from the discoveries of the sculptor Adolf von