Holger Kalweit in 'dreamtime and Inner Space' says: "Shamanism and similar mysterious areas of research have gained in significance because they postulate new ideas about mind and spirit. They speak of things like vastly expanding the realm of consciousness... the belief, the knowledge, and even the experience that our physical world of the senses is a mere illusion, a world of shadows, and that the three-dimensional tool we call our body serves only as a container or dwelling place for something infinitely greater and more comprehensive than that body and which constitutes the matrix of the real life."