Excerpt

With the Lady Jessica and Arrakis, the Bene Gesserit system of sowing implant legends through the Missionaria Protectiva came to its full fruition. The wisdom of seeding the known universe with a prophecy pattern for the protection of B.G. personnel has long been appreciated, but never have we seen a condition-ut-extremis with more ideal mating of person and preparation. The prophetic legends had taken on Arrakis even to the extent of adopted labels (including Reverend Mother, canto and respondu, and most of the Shari-a panoplia propheticus). And it is generally accepted now that the Lady Jessica's latent abilities were grossly underestimated.