I beleive in the 7 levels of existance.
were you reincarnate time and time again till you have learned the lessons you needed to learn.
then Graduate to the next level/sphere/plain of existance. eventually returning to the Creator.
I beleive the Lowest level of spirituality Is the earthly realm.
once your spirit has learned what it has to you Move beyond the Veil and so on..
again another Guess..???..