We are speaking of something entirely different, which can be objectively investigated. The experimenter will want to proceed in a manner that will produce consistent results, perhaps not every time, but often enough to validate the evidence to his own satisfaction. I believe that anyone can experience existence in a Second Body if the desire is great enough. Whether or not anyone should is beyond the scope of my judgment. Evidence has led me to believe that most, if not all, human beings leave their physical bodies in varying degrees during sleep. Subsequent reading has proved that this idea is thousands of years old in man's history. If it is a valid premise, then the condition itself is not unnatural. On the other hand, conscious, willful practice of separation from the physical is contrary to the pattern, it would seem, in view of the limited data available. Harmful physical effects from such activity are undetermined. I have not detected (nor have any physicians) any physiological changes, good or bad, that can be attributed directly to the out-of-the-body experience. There have been many psychological changes that I recognize, and probably many more that I have not been aware of. However, even my friends in the psychiatric profession have not claimed that these have been detrimental. My gradual revision of basic concepts and beliefs is apparent in a number of ways throughout this writing. If these psychological and personality changes are truly harmful, there is not much that can be done about it now. A note of caution is in order here for those who are interested in experimenting, for once opened, the doorway to this experience cannot be closed. More exactly, it is a case of "you can't live with it and you can't live without it." The activity and resultant awareness are quite incompatible with the science, religion, and mores of the society in which we live. History is strewn with martyrs whose only crime was non-conformity. If your interest and research become commonly known, you run the risk of being labeled a freak, phony, or worse, and of being ostracized. In spite of this, something extremely vital would be missing if you did not continue to explore and investigate. In the unaccountable "low" periods when you cannot produce this activity no matter how carefully you try, you realize this deeply. You have a strong sense of being left out of things, of the shutting out of a source of great meaning to living. Here, then, is the best written description I can give of the technique of developing the non-physical experience.