Paracelsus was foremost among a group of extraordinary characters, who claimed to be the representatives of science at the close of the Middle Ages. These men were of a bold, inquisitive temper, and with all their faults, they had a noble thirst for knowledge. "Better the wildest guess-work, than that perfect torpor which follows the parrot-like repetition of the words of a predecessor!"[248:1] These irregular practitioners, however impetuous and ill-balanced, were pioneers in opening up new fields of investigation, and in exploring new paths, which facilitated the progress of their successors in the search for scientific truths. AGRIPPA HEINRICH CORNELIUS AGRIPPA VON NETTESHEIM, a German alchemist, philosopher, and cabalist, of noble ancestry, was born at Cologne, on the Rhine, September 14, 1486. Having received a liberal education and being by nature versatile, he became in his youth a secretary at the Court of the German Emperor, Maximilian I. He served moreover in the army under that monarch, during several Italian campaigns, and by reason of gallantry, won the spurs of a knight. Becoming averse to the profession of arms, he studied with avidity law, medicine, philosophy, and languages, and in 1509 became Professor of Hebrew at Dôle, in the department of Jura, France. Here his caustic humor and intemperate language involved him in quarrels with the monks, while his restless disposition impelled him to rove in search of adventure. He visited successively London, Pavia, and Metz, where he became a magistrate and town orator. Having expressed opinions contrary to the prevalent beliefs in regard to saints and witches, he was forced to depart abruptly. We next hear of him as a practising physician in Fribourg, Switzerland. Thereafter he became a vagabond and almost a beggar. Like his contemporary, Paracelsus, he advanced the most paradoxical theories during his adventurous career, which latter was partly scientific and partly political, but always turbulent. Finally he established himself at Lyons, where he again practised medicine, and became physician to Louise of Savoy, Regent of France, and the mother of Francis I. Here Agrippa soon fell into disgrace and was banished. In 1528 he joined the Court of Margaret of Austria, ruler of the Netherlands, at Antwerp. On the publication of his work, "On the Vanity of the Sciences," he was imprisoned for a year at Brussels. Upon his release, he returned to Lyons, where he was again detained in custody, on account of an old libel against his former patroness. His death occurred at Grenoble, France, February 18, 1535. Agrippa was possessed of great versatility and learning, but his writings are tinctured with bitterness and satire. He has been described as restless, ambitious, enthusiastic, and credulous, a dupe himself and a deceiver of others. His career was a continuous series of disappointments and quarrels.