Lullaby for a realist

Sometimes I'm heard to voke
As I breathe and sometimes I don't
Pa pa, pa pa, pa pa, pa pa, ah, aah
Pa pa, pa pa, pa pa, pa pa, ah, aah

Sometimes I can't see beyond the scope
It'll all be fine or maybe it won't
Pa pa, pa pa, pa pa, pa pa, ah, aah
Pa pa, pa pa, pa pa, pa pa, ah, aah