Some authors defend the dream-like character of cave art, particularly when performed in the darkest depth of grottes where sensory deprivation may easily take anybody to altered states of awareness.
Coincidentally, one of the most outstanding and classic representations of the topic of illusion versus reality takes place in a cave. The Allegory of the Cave in The Republic by Plato could simply illustrate the enlightening effects of education, but it could also suggest the existence of other dimensions, and the real nature of our shadows and dreams.
DreamTime in Australian Aborigen Mythology is the terms describing the old age in which our heroic ancestors used to live their epic and phantastic adventures. It is easy to see a similarity with the Paradise in Hebrew-Christian tradition, the Garden in Islam religion, The Golden Age in Greek and Roman myths, etc...
Dreams played an important part in the beliefs system of Mesopotamia, China, India, Middle East, Egypt, Greece, Rome, etc... until Christianity considered them inspired by the devil. The relevance of Dreams was finally recovered by Freud and Jung, particularly in those countries where the psychoanalysis is well-accepted by academia and the health administration, Switzerland, Germany, England, France, USA, Argentina, etc...
As an end in itself, Dreams, lucid dreams and Dreamwork in general is of course a wonderful path of self-discover. Besides, Dreamwork should help clean warriors' soul before diving into power plants rituals, thus making sure an easier trip.
You are welcome to list here all links related to dreams from the perspective of Integral and Jungian psychology.
Michiu Kaku on dreams.
why we dream - BBC.