, a dune is a hill
built by wind. Dunes occur in different forms and sizes, formed by interaction with the wind. Most kinds of dunes are longer on the windward side where the sand is pushed up the dune and have a shorter "slip face" in the lee of the wind. The valley or trough between dunes is called a slack. A "dune field" is an area covered by extensive sand dunes. Large dune fields are known as erg
Some coastal areas have one or more sets of dunes running parallel to the shoreline directly inland from the beach
I must not fear. Fear is the mind-killer. Fear is the little-death that brings total obliteration. I will face my fear. I will permit it to pass over me and through me. And when it has gone past I will turn the inner eye to see its path. Where the fear has gone there will be nothing. Only I will remain.
To attempt an understanding of Muad'Dib without understanding his mortal enemies, the House Harkonnen|Harkonnens, is to attempt seeing Truth without knowing Falsehood. It is the attempt to see the Light without knowing Darkness. It cannot be.
If wishes were fishes, we'd all cast nets.
The mystery of life isn't a problem to solve, but a reality to experience.
"You've heard of animals chewing off a leg to escape a trap? There's an animal kind of trick. A human would remain in the trap, endure the pain, feigning death that he might kill the trapper and remove a threat to his kind."
A process cannot be understood by stopping it. Understanding must move with the flow of the process, must join it and flow with it.
"Yueh! Yueh! Yueh!" goes the refrain. "A million deaths were not enough for Yueh!"
Muad'Dib learned rapidly because his first training was in how to learn. And the first lesson of all was the basic trust that he could learn. It's shocking to find how many people do not believe they can learn, and how many more believe learning to be difficult. Muad'Dib knew that every experience carries its lesson.