D.Litt. et Phil. / The aim of this investigation is to provide support to the growing evidence that people's paradigms directly influence the way differences are managed. Adherence to the old or Newtonian model has seemingly led to a restricted ability to deal with differences. Adherence to the new or quantum model, on the other hand, appears to facilitate not only the understanding of why there are so many differences and why they should be "celebrated" (topic of the American Counselling Association's 1995 Conference, Denver), but also encourages people to freely and nonjudgementally acknowledge, explore and integrate these differences. As a first step toward achieving this aim, a review of the literature regarding the existence of differences, the perceived causes of differences, and the perceived ways of managing differences in interpersonal relationship up to the present time will be provided. Secondly, the importance of paradigms in general, and of the natural scientific paradigms in particular, will be illustrated. Concepts of Newtonian and quantum physics that are considered relevant to the investigation will be described under this heading. Thirdly, the rationale of the exploratory, or qualitative study will be outlined. Fourthly, a chapter linking the natural scientific paradigms . to the discipline of psychology will be presented. Psychological analogies of Newtonian and quantum concepts will be put forward as well as examples of Newtonian and quantum psychology. Finally, implications of the described and discussed findings of Newtonian and quantum physics on the management of psychological differences will be explored, so that the 'celebration' and integration of differences can, indeed, be promoted.