Plato also separated the body from the soul. Socrates couldn't wait to leave his body behind, but perhaps that is too easy a reading of Plato, in any case the soul/body dualism was in Greek thought at this point in time. Descartes chiseled the world into two different kinds of substances: res extensa and res cogitans, but he had no explanation of how they communicate. His radical doubt ultimately left dualists to have to contend with solipsism.

I think that there is no separation, that heart & soul are inexorably enmeshed in our thoughts and actions. That the soul is the essence of our self, which is a mixture of body and soul.

The most important symbolic number in Judaism is 13. If you draw a cube you can count 12 lines. This represents the 3 dimensional material realm. The extra number 1 represents God or spirit. There were originally 13 tribes not 12. The Levite tribe represents the spiritual component of the 13 tribes yet was fully a member of the tribes. This is basically a Pantheistic spiritual concept. The Christian misinterpretation of the duelist nature of reality seems to be the problem. They also misinterpreted the concept of Satan as being a God with evil power, separate and independent from God and Human Nature. Ultimately they are all just conceptual. Everything is one, I know thats just another concept but, I believe, much closer to objective truth. At least everything experiences the same process of birth, evolution, deconstruction, and reformation.

Complementarity?