The medical art inherited among the people from generation to generation is a subject which none but a clear-sighted and unprejudiced scientist of the medical profession can treat, and which has been left hitherto without that investigation which the subject undoubtedly deserves, at least from a historical point of view. There was, at the end of the Middle Ages, among the devotees of the Galenic art a man of genius who, despairing to find in the folios of the medical scholastics any traces of truth, abandoned the lecture-room and went forth into the world without in order, as he himself said, to read the book of nature and learn something of that medical instinct with which God, as he believed, must have endowed men as well as animals, and which must find a true expression only in the people living in immediate reciprocity with nature. This man was Paracelsus. He who despised and overwhelmed with mockery the coryphei of his days in the medical faculties, did not disdain to listen to "the experience of peasants, old women, night-wanderers, and vagabonds," and the magnetical system which he constructed "by the illumination of nature's light, and not by the lamp-flare of an apothecary's shop," rest in all probability on the general principles which he found in the plurality of sympathetic cures practiced among the people. In the "reading" by which these cures were accompanied, Paracelsus saw rightly nothing but a subjective moment, and means of making faith and imagination the allies of the physician. A mass of these conjuration-formulæ in different diseases have been collected and published in various countries of Europe. They offer the reader little or nothing of interest.[58]