He usually viewed fireplace as the Firmament that sat involving air and water in the heavens. In De Meteoris, Paracelsus wrote that the firmament is the heavens. As a medical professional of the early 16th century, Paracelsus held a all-natural affinity with the Hermetic, Neoplatonic, and Pythagorean philosophies central to the Renaissance, a earth-check out exemplified by Marsilio Ficino and Pico della Mirandola.