Despite the strangeness of the title of this book, as it may seem to many, I am a one hundred percent pragmatic and materialistic person, who does not believe in any unproven nonsense and perceives only what can be touched with my own hands and seen with my own eyes. Astral, like the external mystical world is of little interest to me. I am interested in the state of the brain, which is usually called it, to the study and practice of which I have devoted my entire life since I was 15 years old. In fact, the astral plane, out-of-body experiences (OBEs) and lucid dreams (LUs) are phenomena of the same nature, the same brain state (phase). The practice of this state with a variety of applied purposes is one of the most powerful and promising movements of our time. You will learn exactly how this condition affects the body in this book.