Some 21,000 years in the future, the human race has scattered throughout the known universe and populated countless planetary systems, which are ruled by aristocratic royal houses who in turn answer to the Padishah Emperor Shaddam IV. Science and technology have evolved far beyond that of our own time despite the prohibition of computers and artificial intelligence. Humans with highly-developed minds, called Mentats, perform the functions of computers. The CHOAM corporation is the major underpinning of the Imperial economy, with shares and directorships determining each House's income and financial leverage. Key is the control of the desert planet Arrakis, the only source of the valuable spice melange, which gives those who ingest it extended life and some prescient awareness. Melange is crucial to space travel, which is monopolized by the Spacing Guild. Their Navigators use the spice to safely plot a course for the Guild's heighliner ships using prescience and "foldspace" technology, which allows instantaneous travel to anywhere in the universe.
But the litany goes: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.