﻿TWENTIETH 
  CENTURY 
  PHYSICS 
  MILLIKAN 
  199 
  

  

  nature's 
  game, 
  so 
  that 
  our 
  progress 
  is 
  not 
  made 
  by 
  hit 
  or 
  miss 
  ex- 
  

   perimenting 
  or 
  by 
  random 
  theorizing, 
  but 
  by 
  following 
  a 
  more 
  or 
  

   less 
  systematic, 
  if 
  not 
  always 
  a 
  strictly 
  logical 
  procedure; 
  but 
  the 
  

   day 
  has 
  gone 
  by 
  when 
  any 
  physicist 
  thinks 
  that 
  he 
  understands 
  the 
  

   foundations 
  of 
  the 
  physical 
  universe 
  as 
  we 
  thought 
  we 
  understood 
  

   them 
  in 
  the 
  nineteenth 
  century. 
  The 
  foregoing 
  discoveries 
  of 
  our 
  

   generation 
  have 
  taught 
  us 
  a 
  wholesome 
  lesson 
  of 
  humility, 
  wonder, 
  

   and 
  joy 
  in 
  the 
  face 
  of 
  an 
  as 
  yet 
  incomprehensible 
  physical 
  universe. 
  

   We 
  have 
  learned 
  not 
  to 
  take 
  ourselves 
  as 
  seriously 
  as 
  the 
  nineteenth 
  

   century 
  physicists 
  took 
  themselves. 
  We 
  have 
  learned 
  to 
  work 
  with 
  

   new 
  satisfaction, 
  new 
  hope 
  and 
  new 
  enthusiasm 
  because 
  there 
  is 
  still 
  

   so 
  much 
  that 
  we 
  do 
  not 
  understand, 
  and 
  because, 
  instead 
  of 
  having 
  

   it 
  all 
  pigeonholed 
  as 
  they 
  thought 
  they 
  had, 
  we 
  have 
  found 
  in 
  our 
  

   lifetimes 
  more 
  new 
  relations 
  in 
  physics 
  than 
  had 
  come 
  to 
  light 
  in 
  

   all 
  preceding 
  ages 
  put 
  together, 
  and 
  because 
  the 
  stream 
  of 
  discovery 
  

   as 
  yet 
  shows 
  no 
  signs 
  of 
  abatement. 
  

  

  