The hallucinogenic world, in environmental terms, 
can be considered as a forlorn effort of man to 
match the speed of power of his extended nervous  
system (which we call the “electronic world”) by 
intensifying the activity of his inner nervous 
system. This is somewhat like the use of the fast 
motor car as a way of fighting back at the 
overpowering scale of highrise and metropolitan 
buildings.

Marshall McLuhan to Robert J. Leuver, July 30, 
1969, Letters of Marshall McLuhan , (Toronto, 
1987), p. 388.