The Missionaria Protectiva, a branch of the Bene Gesserit, is responsible for planting and maintaining the Panolplia Prophetica, a group of myths and prophecies that are planted and spread throughout the known galaxy. By manipulating various religious themes, members of the Bene Gesserit are able to take advantage of religious beliefs by assuming various roles from within the prophesies, thereby gaining some either protected status or infiltrating various other organizations.
Along with the practical application of these ideas, the ability of the Bene Gesserit to plant religious ideology across the known galaxy gives them great political clout within the empire.
The most notable example of the Missionaria Protectiva's work include prophesies of the Lisan al-Gaib or The voice from the outer world. The Lisan al-Gaib is a messiah of sorts born of a Bene Gesserit which was used by Jessica after she and her son Paul Atredies had been found by the Fremen.