In both theology and religion, there is a concept called “dualism”, which — to avoid confusion later — I’ll note now has nothing much to do with “duality” as understood within modern physics.  The former concept involves the notion that there are two aspects of reality which may either be diametrically opposed, mutually inconsistent, balanced or unbalanced, or even complementary — but always conceptually separable such that they refer to two different things. Good or evil.  Material or immaterial.  Mind or matter.  Spiritual or physical. Even male or female. As this article from the Jewish Virtual Library describes, many of…

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