"Know that man makes great discoveries concerning future and hidden 
things, which are despised and scoffed at by the ignorant who do not 
realize what nature can accomplish by value of her spirit.  Thus, the 
uncertain arts are in such a state now that a new generation must come, 
full of prophetic or sibylline spirit, which will awaken and direct the 
skills and arts.  The arts of this kind are quite old, and enjoyed great
 reputation among the ancient.  They are kept secret and taught 
secretly.  For the students of these arts devoted their time to 
contemplation and inner faith, and by such means discovered and proved 
many great things.  But the men of today have no longer such capacity 
for imagination and faith; today their minds are exclusively concerned 
with things that are pleasant to the flesh and the blood; only what the 
flesh and the blood want and desire is being studied, that alone is 
still being practiced.  These arts are uncertain today because man is 
uncertain in himself.  For he who is not certain in himself cannot be 
certain in his actions; a sceptic can never create anything enduring, 
nor can anyone who serves only the body accomplish true spiritual 
works." 
       –  Paracelsus,  Astronomia Magna , 1537-38.
