back to The Essential Key of the Great Work
"The Stone is everywhere."
The stone is the symbol of the mind. It is an intelligent energy or spirit, that vivifies everything. Thus it is found in all four elements as is shown in this engraving.
Therefore when the alchemist wants to start the alchemical process, he first have to find the stone, or Matter, to work with.
All you have to do is just look inside yourself, because it is already there.