Scientific ideas inspired by religious, magical, and alchemical themes competed alongside traditional Aristotelian science and the emerging mechanical philosophy in the early modern era. At the center of this ferment was a quirky and creative German physician, Paracelsus, whose religious-alchemical worldview served as an inspiration for countless scientific innovators. This collection is about Paracelsus and the wide range of issues he explored, and ones taken up by many who were directly or indirectly affected by the same mental universe that sustained his thought and writings. This volume includes strong contextual studies on Paracelsianism and the larger cultural history of early modern science, including groundbreaking studies on Robert Boyle, François Rabelais, Giovanni Pico della Mirandola, and Johannes Praetorius.