A natural hierarchy is simply an order of increasing wholeness, such as: particles to atoms to cells to organisms, or letters to words to sentences to paragraphs. The whole of one level becomes part of the whole of the next. In other words, natural hierarchies are composed of holons.
Ken WilberSpirit forgets that it's Spirit and condenses to a smaller version of itself, which is soul. Soul forgets that it's soul and condenses to mind. Mind forgets that it's mind and condenses to body. Body forgets that it's body and condenses to the lowest dimension that you can have, which is matter.
Ken WilberLike going to the dentist, where you write: "Dental appointment today. All of the dentists in Boulder are 'holistic.' They can't fill a cavity but they're good for your soul. Your teeth rot, but apparently your spirit prospers."
Ken WilberThat all oppositesโsuch as mass and energy, subject and object, life and deathโare so much each other that they are perfectly inseparable, still strikes most of us as hard to believe. But this is only because we accept as real the boundary line between the opposites. It is, recall, the boundaries themselves which create the seeming existence of separate opposites. To put it plainly, to say that "ultimate reality is a unity of opposites" is actually to say that in ultimate reality there are no boundaries. Anywhere.
Ken WilberThe point of the overall meditative path is to have Wakefulness (or Consciousness as Such) transcend and include all state-realms, so it ceases to "black out" or "forget" various changes of state (such as dreaming and deep sleep), and instead recognizes a "constant Consciousness" or ever-present nondual Awareness, the union (and transcendence) of individual finite self and infinite Spirit.
Ken Wilber