The spice must flow.
The Spacing Guild's secret report in David Lynch's Dune (1984); a film line, not in the novel
Dune
The spice must flow.
He who controls the spice controls the universe.
Baron Harkonnen
Without change something sleeps inside us, and seldom awakens. The sleeper must awaken.
Duke Leto Atreides
Long live the fighters!
Paul Atreides