The psychiatrist reiterates here what anthropologists know from fieldwork. In the worldview of peoples around the globe, ordinary reality is accompanied by its twin reality. Carlos Castaneda coined the term "separate reality" for it. regardless of whether or not we accept the opinion of the psychiatrists about the ephemeral quality of any kind of reality, we must certainly realize that the separate reality has social validity. In the universe of societies uncounted millions of people act in such a way as to demonstrate that in their experience the separate reality exists "out there." However, it looks different to different societies.
In other words, while the ability to enter into religious altered state of consciousness is a physical ability all humans share, the cultural perception of the reality encountered in the state is culturally patterned. To use a simile, the separate reality might be thought of as a vast space. Each kind of religious system can encompass only a small section of it. In the same manner, as various countries are inhabited by people specking different languages, having different heroes, and living under different systems of government, the separate reality is also very distinct in its many parts.
For instance, although Hindus of India, traditional Chinese, the Yoruba of Nigeria, and Roman Catholics all profess agriculturalist religions characterized by a godhead surrounded by an aura of specialists, the obviously also differ in many significant ways. In large, modern, stratified states a further distinction is introduced by the Western, so-called scientific, tradition. For at least two centuries this tradition has emphasized the preeminence of knowledge, to the exclusion of all other states, for which training was no longer offered. This produced a situation where, as Walsh says, "it is very difficult, of not impossible, to recognize the limitations of the usual state of consciousness if that is all that one has ever known".