Paracelsus: Concerning the Nature of Things(1537)
Book I: Concerning the Generation of Natural Things
THE generation of all natural things is twofold: one which takes place by Nature without Art, the other which is brought about by Art, that is to say, by Alchemy, though, generally, it might be said that all things are generated from the earth by the help of putrefaction. For putrefaction is the highest grade, and the first initiative to generation. But putrefaction originates from a moist heat. For a constant moist heat produces putrefaction and transmutes all natural things from their first form and essence, as well as their...