"Electro-magnetism, the so-called discovery of Professor Oersted, had been used by Paracelsus three centuries before. This may be demonstrated by examining critically his mode of curing disease. Upon his achievements in chemistry there is no need to enlarge, for it is admitted by fair and unprejudiced writers that he was one of the greatest chemists of his time. (Hemmann: "Medico-Surgical Essays," Berl, 1778) Brierre de Boifcmont terms him a "genius" and agrees with Deleuze that he created a new epoch in the history of medicine. The secret of his successful and, as they were called, magic cures lies in his sovereign contempt for the so-called learned “ authorities ” of his age. "Seeking for truth," says Paracelsus, "I considered with myself that if there were no teachers of medicine in this world, how would I set to learn the art? No otherwise than in the great open book of nature, written with the finger of God. ... I am accused and denounced for not having entered in at the right door of art. But which is the right one? Galen, Avicenna, Mesue, Rhasis, or honest nature ? I believe, the last! Through this door I entered, and the light of nature, and no apothecary’s lamp directed me on my way." (p. 164)"