if you view this as boolean algebra, then it is intepreted like this:

truth = all truth = knowable truth + unknowable truth
unknowable truth = god + other unknowable truth

therefore, truth = all truth = truth + god = life
this is still correct because god is merely a subset of truth, instead of being mutually exclusive from truth. if want to express as mutually exclusive entities, then it needs to be rewritten as:

truth = all truth = knowable truth + unknowable truth = knowable truth + god + other unknowable truth

so,
knowable truth + god + other unknowable truth = life

then,
knowable truth + other unknowable truth = life - god

then,
god = life - knowable truth - other unknowable truth

conclusion, got to have faith