Source: 1930s, The conflict between Aristotelian and Galileian modes of thought in contemporary psychology, 1931, p. 165.
“In the psychological fields most fundamental to the whole behavior of living things the transition seems inevitable to a Galileian view of dynamics, which derives all its vectors not from single isolated objects, but from the mutual relations of the factors in the concrete whole situation, that is, essentially, from the momentary condition of the individual and the structure of the psychological situation. The dynamics of the processes is always to be derived from the relation of the concrete individual to the concrete situation, and, so far as internal forces are concerned, from the mutual relations of the various functional systems that make up the individual.”
Source: 1930s, A Dynamic Theory of Personality, 1935, p. 41; partly cited in: Kay Deaux, Mark Snyder (2012) The Oxford Handbook of Personality and Social Psychology. p. 74
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Kurt Lewin 48
German-American psychologist 1890–1947Related quotes
Source: 1930s, A Dynamic Theory of Personality, 1935, p. 42 as cited in: Anthony C. Westerhof (1938) Representative psychologists. p. 48.
                                        
                                        p, vii (1974) 
1960s, Fights, games, and debates, (1960)
                                    
Source: The Foundations of Normal and Abnormal Psychology (1914), p. 39
Source: "Social Behavior as Exchange," 1958, p. 597; Article abstract
Source: General System Theory (1968), 2. The Meaning of General Systems Theory, p. 31
                                        
                                        As cited in: D.C. (1969) "Systems Theory — A Discredited Philosophy". in: Abacus V. p. 4 
1950s, Problems of Life (1952, 1960)
                                    
                                        
                                        Kunnumpuram, K. (2007) The Indian Church of the Future.  Mumbai: St Pauls, p. 26 
On the Church
                                    
Source: Mind, Self, and Society. 1934, p. 1 , lead paragraph