Alchemy is a multifaceted subject. It is an early form of chemical technology exploring the nature of substances. It is also a philosophy of the cosmos and of mankind's place in the scheme of things. Alchemy developed an amazing language of emblematic symbolism which it used to explore the world. It had a strong philosophical basis, and many alchemists incorporated religious metaphor and spiritual matters into their alchemical ideas.

In the 20th century, interest in alchemy was revived, following its decline and total eclipse in the 19th century. Today alchemy is often used as a catch word for obscure and enigmatic symbolism, or for the idea of spiritual transformation and inner change.