Ivan Pavlov, conditioned reflexes

 
    “Conditioned reflexes are phenomena of common and widespread 
     occurrence: their establishment is an integral function in 
     everyday life. We recognize them ourselves and in other 
     people under such names as ‘education’, ‘habits’, and 
     ‘training’; and all of these are really nothing more than the 
     results of an establishment of new nervous connections 
     during the post-natal existence of the organism.”; 
            ── Ivan Pavlov, Conditioned Reflexes:                
               An Investigation of the Physiological Activity 
               of the Cerebral Cortex, 1927, 
               translated from the Russia,
               St. Petersburg Military Medical Academy; 
               Tom Butler-Bowden, 50 psychology classics, 2007, 
               p.210