“The subconscious mind is more susceptible to influence by impulses of thought mixed with ‘feeling’ or emotion than by those originating solely in the reasoning portion of the mind.” — Napoleon Hill
By this point in the book, the subconscious mind has been mentioned in nearly every chapter. Here Hill gives it a full examination as a principle in its own right — because understanding how it works is the key to understanding why everything else in the system does.
The subconscious mind, Hill explains, is a vast filing system that receives, records, and acts upon every impression that reaches it — whether invited or not, whether positive or negative, whether accurate or false. It works 24 hours a day, seven days a week, whether you are sleeping or awake. It processes more information per second than the conscious mind could ever handle. And it is the intermediary between your finite thinking and what Hill calls Infinite Intelligence — the source of all creative inspiration.
The critical thing to understand is this: the subconscious mind accepts what it receives without judgment. It does not evaluate, reason about, or filter the thoughts you feed it. It accepts them as true and proceeds to find ways to make them real. This is simultaneously the greatest power and the greatest danger of the subconscious.
Hill compares the subconscious mind to a garden. A garden grows whatever is planted in it — flowers and weeds alike, without preference. If you plant seeds of failure, doubt, fear, and limitation, the garden grows exactly those things. If you plant seeds of desire, faith, courage, and abundance, it grows those instead.
The conscious mind is the gardener. It can choose what to plant and what to uproot. But most people never become conscious gardeners — they allow whatever seeds the environment carries to fall into the garden and grow unsupervised. The result is the garden they have, rather than the garden they want.
This is why Hill places so much emphasis on controlling the mental environment. You cannot plant flowers and expect weeds not to compete. The deliberate practice of auto-suggestion, visualization, and affirmation is not self-delusion. It is conscious gardening — taking control of what gets planted in the most fertile soil available.
Hill identifies seven positive emotions that, when mixed with thought, create the most powerful seeds for the subconscious:
These emotions are not just pleasant feelings. They are, in Hill’s framework, the carriers that deliver thoughts to the subconscious with the greatest impact. A thought mixed with genuine enthusiasm reaches the subconscious more powerfully than the same thought delivered flatly. This is why the emotional component of auto-suggestion is not optional.
Just as positive emotions amplify the delivery of constructive thoughts, negative emotions amplify the delivery of destructive ones. Hill names these as the enemies of success:
The problem with these emotions is not merely that they feel unpleasant. It is that they plant seeds in the subconscious just as effectively as positive emotions do — perhaps more effectively, because negative emotions tend to be more intense and more involuntary. A person who lies awake at night consumed by fear is delivering a powerful, emotion-charged instruction to their subconscious: “This is what is real. Prepare for this.”
Hill’s practical contribution here is the claim that you can communicate with your subconscious deliberately — not just receive whatever it happens to produce, but send specific instructions and receive specific responses.
The method is the one he has been building throughout the book:
Hill and others who have studied creativity and problem-solving have noted that many of the best ideas and solutions arrive in the hypnagogic state — the threshold between waking and sleep, or between sleep and waking. Edison famously exploited this by sitting in a chair holding ball bearings in his hands, so that when he drifted off, the balls would drop and wake him, allowing him to capture the ideas that arrived at that boundary.
The instruction Hill gives for the twice-daily reading practice — before sleep and upon waking — targets exactly these windows when the subconscious is most accessible.
What thought do you fall asleep with most nights? What is the dominant emotional tone of your inner monologue as you prepare for sleep — anxiety about tomorrow, frustration about today, or anticipation and gratitude for what you’re building? Whatever that emotional state is, you are delivering it to the most receptive version of your subconscious. Is it the instruction you would deliberately choose to send?