Almost every field in the sciences and in the humanities is influenced by the systems movement, and many systems approaches have been suggested within the different disciplines, MS/OR included. Some authors stress their own versions of the systems approach and ignore the manifold variety of others. In contrast, I plead for a methodological pluralism of systems approaches. To serve this purpose, I present a typology of four systems approaches, each one in a dialogue between a master and a scholar: (1) the introspection of analytic reduction, (2) the extraspection of synthetic integration, (3) the construction of creative design, and (4) the contemplation of holistic meditation.