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Brought forth in its entirety from the Arnsburg Library of the Most Reverend Lord Ernest, Elector and Bishop of Cologne Ernest of Bavaria (1554–1612), who was a notable patron of alchemy.
Wherein the actual and steadfast opinions of all true philosophers In this context, "philosophers" refers specifically to alchemists or "philosophers of nature" are demonstrated in a compendium and brief summary, with true natural foundations and entirely intelligible reasons, and set before the eyes of all Sons of Doctrine original Latin: "Doctrinæ filijs"; a traditional alchemical term for dedicated students of the art.
Also attached is an Epistle to all the Philosophers of Germany:
Cleansed and fixed spirits are the most ready
medicine for the transformation of bodies.
original Latin: "Spiritus Mundati & fixi sunt præsentissima medicina Corporum alterandorum"