sentences:  For the last ten years of his life, Severinus enjoyed relative freedom from official duties, yet failed to produce any additional writings since his influential work, "Idea medicinæ philosophicæ" in 1571.Severinus very early in his career was drawn to the teachings and writing of the German medical reformer Theophrastus Paracelsus (1493-1541).Severinus’ "Idea medicinæ philosophicae" (1571) is his most important written work, which interprets the teachings of Paracelsus.