This has been defined as a spirit, or invisible man or animal, of ethereal substance, the counterpart of the visible body, within which it resides, and to which it imparts life, strength, and the power of assimilating food.[261:2] Archaeus was regarded as the creative spirit, which, working upon the raw material of water or fluidity, by means of a ferment promotes the various actions which result in the development and nutrition of the physical organism. As life and all vital action depended upon archaeus, any disturbance of this spirit was regarded as the probable cause of fevers and other morbid conditions.
FLUDD
Robert Fludd, surnamed "the Searcher," an English physician, writer and theosophist, member of a knightly family, first saw the light at Milgate, Kent, in the year 1574. His father, Sir Thomas Fludd, was Treasurer of War under Queen Elizabeth. Robert was a graduate of St. John's College, Oxford.
After taking his degree in 1598, he followed the example of many another man of original mind, athirst for knowledge of the world, and led a roving life for six years, "in order to observe and collect what was curious in nature, mysterious in arts, or profound in science."
Returning to London in 1605, he entered the College of Physicians, and four years later receiving a medical degree, he established himself at his house in Coleman Street, in the metropolis, where he remained until his death in 1637.
Fludd was a voluminous writer, and one of the most famous savants of his time. He was at once physician, chemist, mathematician, and philosopher. But his chief reputation was due to his system of theosophy. Profoundly imbued with mystical lore, he combined in an incomprehensible jumble the doctrines of the Cabalists and Paracelsians. William Enfield, in the "History of Philosophy," remarks of the peculiarity of this philosopher's turn of mind, that there was nothing which ancient or modern times could afford, under the notion of modern wisdom, which he did not gather into his magazine of science. Fludd was reputed to be a man of piety and great learning, and was an adept in the so-called Rosicrucian philosophy. In his view, the whole world was peopled with demons and spirits, and therefore the faithful physician should lay hold of the armor of God, for he has not to struggle against flesh and blood. He published treatises on various subjects which are replete with abstruse and visionary theories. The title of one of these treatises is as follows: "De Supernaturalis, Naturalis, Praeternaturalis, et Contranaturalis Microcosmi Historia, 1619."
The phenomena of magnetism were ascribed by him to the irradiation of angels. Robert Fludd enjoyed the acquaintance and friendship of many scientists at home and abroad, and was without doubt one of the most versatile and erudite of contemporary British scholars.
He devoted much time to scientific experiments and natural philosophy, and constructed a variety of odd mechanisms, including an automatic dragon and a self-playing lyre.[264:1] Moreover, he was a believer in mystical faith-cures, and in the existence of a kind of dualism in therapeutics, whereby sickness and healing were produced by two antagonistic forces.