Paracelsus (born Philippus von Hohenheim, 11 November or 17 December 1493 – 24 September 1541) was a German-Swiss Renaissance physician, botanist, alchemist, astrologer, and occultist. “Paracelsus”, meaning “equal to or greater than Celsus”, refers to the Roman encyclopedist Aulus Cornelius Celsus from the 1st century, known for his tract on medicine. He is also credited for giving zinc its name, calling it zincum, and is regarded as the first systematic botanist.

Our uncertainty about ourselves is at the base of our uncertainty of all things.