Why it isn't dangerous to project the astral body?
Answers from the books of Samael Aun Weor
Really, this is a natural process: realizing one’s own natural processes could never be harmful; to carry out all these functions consciously, instead of making it in unconscious and involuntary form, is in no way dangerous and, because of this, I put certain emphasis on the necessity of taking advantage of the instant of transition between the vigil and the dream in order to abandon the physical body and enter into the region of the Mysteries.
There are incredulous people that say: " What can you say about the Beyond? What could you know on what there is beyond Tejas further up? Maybe you have gone to the other world and returned"?, etc., etc., etc.
My friends, I assure you that with this procedure you could go to the other world and return; I could swear to you by what I mostly love in this life that I go to this other world every time that I want, and that you could also go; the important point is that you should not be afraid.
Samael Aun Weor. Excerpt from the book: Looking at the Mystery.