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).
"It is necessary to know that humanity lives with its consciousness asleep. People work asleep. People walk through the streets asleep. People live and die asleep. When we come to the conclusion that the entire world lives asleep, then we comprehend the necessity of awakening. We need the awakening of the consciousness."
- Samael Aun Weor, The Perfect Matrimony