Rudolf Steiner (1861-1925) said that black magicians and other evildoers will create medicines that will deaden people to all things spiritual: "Endeavors to achieve this will be made by bringing out remedies to be administered by inoculation . . . only these inoculations will influence the human body in a way that will make it refuse to give a home to the spiritual inclinations of the soul."

(Steiner R. Secret Brotherhoods. London: Rudolf Steiner Press, 2004, pp. 90-91).