In this chapter, Napoleon Hill introduces the idea of the “sixth sense,” which he describes as an intuitive faculty that provides flashes of insight, inspiration, and guidance beyond ordinary reasoning. It is the highest stage of using the mind, developed only after mastering the principles of desire, faith, autosuggestion, imagination, and organized planning. Hill explains that the sixth sense acts as a “guardian angel,” warning you of dangers and presenting new opportunities. Many great leaders and inventors relied on these sudden hunches or gut feelings to make decisions that logic alone could not explain. He also notes that this faculty cannot be forced but develops naturally through disciplined thought, persistence, and close connection with one’s subconscious and “infinite intelligence.” Core takeaway: The sixth sense is your mind’s intuitive power, offering guidance and inspiration once you’ve trained yourself in the other success principles.