This article is from the Dune FAQ, by Alan Schwartz with numerous contributions by others.
Mentat Piter de Vries (Brad Dourif) recites this litany in the movie
version of Dune, and Mentat Hayt de Vries (Robert Carin) repeats it in
Westwood's computer game Dune 2000. It does not appear anywhere in the
books, but is a movie construct from the mind of David Lynch.
It is by will alone I set my mind in motion.
It is by the juice of sapho that thoughts acquire speed,
the lips acquire stains.
The stains become a warning.
It is by will alone I set my mind in motion.
 
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