Bones is regard to marrow is the puryifing factory of blood . A broken bones dries up the spirit .
I think you could say where the two meet. The spirit as that not seen meeting the physical seen both working together as one labor of love or work of faith to do the will of another.
No spirit, no good work of suffering to obey God who does work in the Elect to both will and do his good pleasure (imputed righteousness)
For as the body without the spirit is dead, so "faith without works" is dead also. James 2