Theophrastus Bombastus Von Hohenheim , better known as “Paracelso”(1493-1541).

For him, the empirical study of the nature develops on a visionary mystical background.

His boundless .written Work, near how impossible to embrace in full, it swarms both of instructions for the preparation of pharmaceutical substances of vegetable or metallic origin, and of concepts mystical natural, referable to the Astral Magic, to the Cabal and the Christian Mysticism. Paracelso compared the imagination to a magnet that with his/her strength it attracts then the objects of the external world inside the uomo,per to transform them. The faculty of the imagination was identified therefore sinbolicamente with that of the alchimista,scultore or fabbrointeriore. To possess was it essential, because for the German physician-philosopher "the man is what he thinks, and also the thing that he thinks.If he thinks a fire, he is a fire." The alchemists individualized in the masculine sulphur, able to solidify and to mould, the necessary antagonist of Mercury. Paracelso added a further principle to this medieval doctrine, contributing so in decisive way to the to rise up of a more dynamic vision of the natural phenomenons. He elects to third fundamental principle the Salt. its faculty of crystallization corresponds to the body. Thanks to his fat and oily inflammability, the Sulphur assumes the mesne position of the soul. While Mercury, the fluid principle and sublimabile, represent the fugitive spirit.Such Trias before Paracelso don't constitute in any way substances chemical, on the contrary active spiritual strengths; according to mutable relationships among ingredients, the invisible blacksmiths or artisans of the nature they produce the provisional material conditions of the things of the world. In the speculative alchemy of the most advanced period, particularly inside the Masonic tides of the XVII century, the arcane salt him it set to the center of the hermetic-gnostic mysticism. In virtue of his therapeutic ownerships he was seen in sense cristologico as "light coagulated of the world", as "secret central fire or salt of the wisdom."