the lyrics might change a little for Harmonium, but so far im guessing its about--
escaping your body / reality to go to a more peaceful 'imaginative' place
and/or
a woman with drug problems who finds it difficult to quit
...romours about someone still hooked on drugs although she says she's quit.
that is, if it goes "God knows she quits, though i'm told she floats"(meaning...noone knows if she quit, but romour has it she still "floats" a.k.a. gets HiiigHh)
meh, maybe maybe not, i'll have to see the lyrics in the booklet to be sure.