What be the guide

Grammar is like the hardest math
and loudest science
there is structure and pattern
perhaps probability
but not a way things must be
or an interpretation, you see
where fair weather cheats
there are clouds on high mountains
under the cheap seats
there are empty buckets of popcorn
and beyond the rules
there is nausea 
and the sense that all was lost
before the start
and all was none
ex nihilo
but Latin won't help
as the darkness showed
so fetch up some kelp
all that could glowed.