It is said of Muad’Dib that once when he saw a weed trying to grow between two rocks, he moved one of the rocks. Later, when the weed was seen to be … - Frank Herbert

"For them, 'mektub al mellah', as the Fremen say."
"The thing was written with salt," Irulan translated.

The universe is just there; that’s the only way a Fedaykin can view it and remain the master of his senses. The universe neither threatens nor promises. It holds things beyond our sway: the fall of a meteor, the eruption of a spiceblow, growing old and dying. These are the realities of this universe and they must be faced regardless of how you feel about them. You cannot fend off such realities with words. They will come at you in their own wordless way and then, then you will understand what is meant by “life and death.” Understanding this, you will be filled with joy. — MUAD’DIB TO HIS FEDAYKIN

Respect for the truth comes close to being the basis for all morality.