Final answer:
The quote "Fear is the mind-killer" is from the science fiction classic Dune by Frank Herbert. The novel explores the idea that overcoming fear is essential for personal growth and achievement.
Step-by-step explanation:
The phrase "Fear is the mind-killer" is a famous line from the science fiction classic Dune by Frank Herbert. This statement encapsulates a central theme of the novel, where fear is portrayed as an obstacle to human potential and progress. Characters in the story, especially the protagonist Paul Atreides, learn to confront and control their fears in their journey towards empowerment and leadership. The novel presents fear as an internal enemy that must be mastered, showing how individuals can achieve great things when they do not succumb to their fears. This theme resonates through various forms of literature and psychological studies, indicating the profound effect that fear can have on the mind and behavior.