Complex sentence: In his book "Integral Spirituality" (Shambhala 2006) Wilber identifies a few varieties of states: the most important, with regard to the consciousness of most higher animals, are the three diurnal cycling natural states: waking, dreaming, and sleeping.
Split into simpler sentences: In his book "Integral Spirituality" Wilber identifies a few varieties of states. The most important, with regard to the consciousness of most higher animals, are the three diurnal cycling natural states: waking, dreaming, and sleeping.