Kurt Lewin

"Working in this field I felt that I had begun a task methodologically and technically sound and necessary, the broader elaboration of which could not be expected for decades. Nevertheless it soon beca…"

"a system whose parts are dynamically connected in such a way that a change of one part results in a change of all other parts."

"A business man once stated that there is nothing so practical as a good theory."

"The valence of an object usually derives from the fact that the object is a means to the satisfaction of a need, or has indirectly something to do with the satisfaction of a need."

"A conflict is to be characterized psychologically as a situation in which oppositely directed, simultaneously acting forces of approximately equal strength work upon the individual."

"Only a few years ago one could observe, at least among German psychologists, a quite pessimistic mood. After the initial successes of experimental psychology in its early stages, it seemed to become c…"

"The essential meaning of such an assertion is this: events a and b are necessarily dependent moments of a single unified occurrence . The mathematical formula states the quantitative relations involve…"

"After this first approximation, the various aspects of the situation undergo a more and more detailed analysis. In contrast to this the second method begins with the life space as a whole and defines …"