The practice of sexual transmutation as couple (male-female), a technique known in Tantra and Alchemy. Arcanum refers to a hidden truth or law. A.Z.F. stands for A (agua, water), Z (azufre, sulfur), F (fuego, fire), and is thus: water + fire = consciousness. . Also, A (azoth = chemical element that refers to fire). A & Z are the first and last letters of the alphabet thus referring to the Alpha & Omega (beginning & end).
"We need to study our thoughts, emotions, and actions from moment to moment, without justifying them or condemning them. We need to integrally comprehend all and every one of our defects in all of the profundities of the mind."
- Samael Aun Weor, Elimination of Satan's Tail