In this book the author recounts his near-death experience (NDE) during a meningitis-induced coma. He says that he was encountering the reality of a world of consciousness that existed completely free of limitation of his physical brain.
This idea of overlap is addressed in Theosophy, where the second objective is “To encourage the study of comparative religion, philosophy, and science.” In the Theosophical view religion, science and philosophy are three different approaches to the truth and when rightly followed are not contradictory.