A sophisticated human can become primitive. What this really means is that the human's way of life changes. Old values change, become linked to the landscape with its plants and animals. This new existence requires a working knowledge of those multiplex and cross-linked events usually referred to as nature. It requires a measure of respect for the inertial power within such natural systems. When a human gains this working knowledge and respect, that is called "being primitive." The converse, of course, is equally true: the primitive can become sophisticated, but not without accepting dreadful psychological damage.
Attributed to: Harq al-Ada
From Chapter 13 of Children of Dune by Herbert, Frank