sentences:  Digital edition by the University and State Library Düsseldorf Although Paracelsus’ writings are difficult to discern, his primary contribution to the study of medicine rests on his assertions that medicine could only be learned and improved through a study of nature grounded in Christian principles.Paracelsus also stressed a reliance on chemistry to prepare certain formularies for the treatment of disorders.While a medical student, Severinus began to hear of the success of certain Paracelsian medicines and began to read Paracelsus’ writings.