Logos, Mantra, Theurgy, a book by Samael Aun Weor

First published in 1959, Logos, Mantra, Theurgy is packed with practical exercises for healing, astral travel, spiritual defense, and much more.

"The Theurgist has to acquire a practical, infallible capacity to consciously project himself in the Astral Body. This capacity must be established as a habit that can be exercised voluntarily at any given moment and under any circumstance; it does not matter if one is alone or before witnesses. Otherwise, one is not a Theurgist." - Samael Aun Weor

Logos, Mantra, Theurgy is included in the book The Divine Science.