De Lapide Philosophorum (Philosophers Stone)

...is wood, resin, oil, and other things that burn easily and are naturally inclined toward it. When such a natural fire meets something of its own kind, it continues its work original: "operiert." In alchemy, "operation" refers to the active, transformative process of a substance. and does not cease unless it is destroyed or hindered by its contrary In the alchemical worldview, every element or force has an opposing force (a "contrary") that can neutralize it, such as water acting as the contrary to fire., or if there is no matter original: "materia" present in which it can multiply itself. For when wood or other fuels are added, its power grows ever greater and stronger, thus completing its work as long as nothing more is added to it. Just as it is with wood, through which the fire works and shows its effect, so it also happens with the Philosophers’ Stone original: "Lapide Philosophico" or perpetual balsam original: "Balsamo ppetuo" within the human body. For when the Stone is made from the proper matter and prepared in the philosophical manner, and then administered and used by a wise physician original: "Medico" with sufficient prior consideration of all the person's circumstances, it renews and refreshes the organs of life original: "Organa vitæ" in such a way as if a

Operation of the fire of the Philosophers' Stone. original: "Operatio ignis lapidis Philosophici."