 He depreciated practical laboratory work in favor of theoretical study of the human mind, considering the prevailing education of his day too scholastic.Like many alchemists, Dorn was hostile to the philosophy of Aristotle, with its emphasis upon the material world declaring that "whoever wishes to learn the alchemical art, let him not learn the philosophy of Aristotle but that which teaches the truth".Dorn argued that learning needed a reform as had religion in the Reformation, as had medicine in the teachings of Paracelsus.