Carl Gustav Jung is known to have linked the hermetic symbolism of alchemy in its principles and operations to psychic processes. The alchemical work is inseparable from the operator's own transmutation. According to the principles of the emerald table, what one modifies on the outside modifies the interior and what changes the microcosm also modifies the macrocosm (and vice versa). Alchemy becomes, in this perspective, a discipline of interior work, extraction and sublimation of the components that are mercury, sulfur and salt which have symbolic correspondences with our psyche. This work will be carried out on the materia prima, the raw and primary material that we are. This matter is by definition raw and imperfect and must undergo a transformation, a transmutation to extract a refined, purified substance. This is why we describe alchemy as a hermetic and secret science allowing to transform lead into gold, silver or elixir of long life, represented by the philosopher's stone.