It was a "new thought" to me only about a year or two ago and it
  was such a simple revelation it led to lots of long nights of
  studying and it has taken me in so many fascinating directions.

  I think it can't be helped: We're trained from a very young age
  to see categorical divisions as simply "there" and are valid.
  Or, to contrast, we're also taught that "Divisions are
  ridiculous - All Is One".

  But what's inbetween those? Even those who reject division and
  say "All is One" are ALSO placing a division:

  Divisions / All is One.

  So I would see the / yet _again_.

  How powerful such a simple line is.