The Philosopher’s Stone is something real. It can be understood both spiritually and physically. The spiritual state that is called “the Stone” corresponds to a harmonious blend of all the deposits of psychic energy. Physically speaking, this preparation is quite close to a preparation of Paracelsus’, but he made a substantial error to which he futilely adhered. As for the rest, the Arabic sources on which Paracelsus drew were quite correct. (Heart (opens in new tab), 27)