alchemy"The Medieval alchemists hid the Great Arcanum among innumerable symbols and esoteric allegories. This was in order to save it from profanity, and in order for them to avoid being burned alive in the blazes of the Inquisition." - Samael Aun Weor

Alchemy is an ancient science that preserved the method of transforming the base "metal" (a common person) into "gold" (a fully developed human being).

We have many resources about the precious knowledge. Here are some books, articles, and courses to get you started:

Alchemical Birth
Alchemical Symbolism of the Nativity of Christ
Alchemists Prayer
Alchemy and Kabbalah in the Tarot
Alchemy and Tantra: Sacred Sexuality
Alchemy and the Tetragram (1)
Astral Tinctures
Cain and Abel Part 5: Alchemy
Change Nature, Thus You Shall Find What You Seek
Chinese Alchemy
Description of Stela E: The Alchemist's Work
Extraction of the Mercury
Fuel for Spiritual Experience
Gold and Mercury
Gurdjieff: Sexual Alchemy
Mercury, Hermes
Moses, the Great Kabbalist and Alchemist Magi
Our Work in Red and White
Precepts of Alchemy
Salt, Sulfur, and Mercury
Sexual Alchemy
Speculum Alchemie
Tarot and Kabbalah
The Chaos
The Divine Fohat
The Elements in Spiritual Growth
The Elixir of Long Life
The Fire
The Foundation of Sexual Alchemy
The Furnace and the Receptacle
The Green Lion
The Laboratory of the Alchemist
The Living Lime of the Philosophers
The Metallic Planets of Alchemy
The Perfect Matrimony
The Red Lion
The Secret of Azoth
The Seven Days of Creation
The Seven Planets of Alchemy
The Tattvas of Nature
The Two Mercuries
The Two Witnesses
The White Elixir and the Red Elixir
Treatise of Sexual Alchemy
Types of Salt
Zohar: Alchemy in Kabbalah