Excerpt

The Fremen see her as the Earth Figure, a demigoddess whose special charge is to protect the tribes through her powers of violence. She is Reverend Mother to their Reverend Mothers. To pilgrims who seek her out with demands that she restore virility or make the barren fruitful, she is a form of antimentat. She feeds on that proof that the "analytic" has limits. She represents ultimate tension. She is the virgin-harlot -- witty, vulgar, cruel, as destructive in her whims as a coriolis storm.