"The image is actually captured chemically on celluloid.                                       

                               What we are communicating through film is so unsubstantial -                                

                             fleeting emotions patterned with beams of light and waves of sound.                     

                            To actually hold a frame of film in ones hand, there is a wonderful alchemy in this:

                            That hydrocarbons and silver and iron and various dyes plus intangible time,          

can transmute themselves into the stuff of dreams.                  

                               But compared to the stream of a computers weightless electrons and ghostly digits,  

                                                          film is gravity itself, and in our by now inevitable rush to embrace the electrons weightlessness,            
          
                             for the intoxicating speed and flexibility it  can give ...                                            
                                      

                                 A reel of film is obstinately the way it is and no other -                                             

                               unless you actually rearrange the matter out of which it is made ...                          

                               and there is an anchoring inertial value in that which the fluttering electrons              

                                 for all their nervous power do not share."                                                               


Walter Murch   A.C.E.
from his book
' In the blink of an eye '