Assumption: there exists spirit. Spirit can mean the singular or the plural i.e. a collection of 'sub-spirits' which are merely perceived by mind/body but in actuality exists as a oneness or essence or similar concept.
Theory:
God (spirit) made an image of 'himself' (spirit) (us) which created the body and the mind. This is how God remains seperate from us but how we have a freedom akin to God's
Theoretical development:
Nature= f (environment, me)
Me = spirit, body, mind.
Nature = f (environment, spirit, body, mind)
Spirit creates nature
Spirit creates environment, spirit, body, mind
Spirit creates me and the environment
And spirit creates spirit (just less 'pure forms'
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thoughts/feelings....