" Some say that the spiritual founder of the Rosicrucians was Paracelsus himself. In Huser's edition of his Prognostication Concerning the Next Twenty-four Years there is a woodcut of a child looking toward a heap of Paracelsus's books, some inscribed with a capital R and one bearing the word Rosa. But the significance of this imagery for the Rosicrucians seems spurious.* The rose that the secret society chose as its symbol is in fact derived from the emblem of Martin Luther, in which a heart and cross spring from the center of the flower. The movement began as a society of Protestant Paracelsians founded by the alchemist Johann Valentin Andreae of Herrenberg.

*The Paracelsus connection remains puzzling, however. In the first edition of the Philosophia Magna, published by Birckmann in 1567, the Hirschvogel woodcut of Paracelsus appears in modified form with various strange images in the background that later became clearly associated with Rosicrucianism, such as a child's head emerging from a cleft in the ground. What is the significance of these symbols, fifty years before the Rosicrucian movement came into the open? "

― Philip Ball , The Devil's Doctor: Paracelsus and the World of Renaissance Magic and Science