to what extent

hm ive been wondering to what extent is man a pneumatic or hydraulic creature (creation?). well the latter is pretty self explanatory. blood, lymph, uh.. brain juice? but (and i dun tink im wrong) pneuma is like greek for spirit, and like the second verse of the bible has it. hm.. what an interesting idea.. esp if u extend the metaphor to being 'powered' like hydraulically or pneumatically. i wonder if this is sufficient wit for a sonnet..