Excerpts from The Story of Liet Kynes

Fremen were the first humans to develop a conscious/unconscious symbology through which to experience the movements and relationships of their planetary system. They were the first people anywhere to express climate in terms of a semi-mathematic language whose written symbols embody (and internalize) the external relationships. The language itself was part of the system it described. Its written form carried the shape of what it described. The intimate local knowledge of what was available to support life was implicit in this development. One can measure the extent of this language/system interaction by the fact that Fremen accepted themselves as foraging and browsing animals.