Think and Grow Rich: A Detailed Breakdown of Napoleon Hill's 13 Principles and How to Apply Them Today

First published in 1937, Think and Grow Rich has sold over 100 million copies and remains one of the best-selling self-help books of all time. Napoleon Hill distilled two decades of research — including interviews with Andrew Carnegie, Henry Ford, Thomas Edison, and hundreds of other high achievers — into 13 principles he believed could guide anyone from poverty to prosperity. What follows is a principle-by-principle breakdown, accompanied by practical steps you can take right now.

1. Desire: The Starting Point of All Achievement

Hill argues that a burning, obsessive desire — not a wish or a hope — is the seed of every great accomplishment. He distinguishes clearly between wanting something and demanding it of yourself.

To apply this today, write down the exact amount of money you intend to earn (or the specific goal you intend to reach), the date by which you will achieve it, what you will give in return, and a clear plan. Read that statement aloud twice daily — morning and night.

2. Faith: Visualization and Belief in Attaining Your Desire

Faith, for Hill, is an emotion that can be deliberately cultivated through affirmation and repetition. He writes that the subconscious mind acts on whatever it is repeatedly told, regardless of whether those instructions are true or false — so feeding it empowering beliefs produces empowering actions.

3. Autosuggestion: The Medium for Influencing the Subconscious

Autosuggestion is the practice of feeding the subconscious with deliberate, emotionally charged thought. Hill warns that if you do not consciously plant ideas in your subconscious, random external stimuli will do it for you. Intentional self-talk, journaling, and visualization are the modern tools of autosuggestion.

4. Specialized Knowledge: Personal Experiences or Observations

Hill makes a sharp distinction between general knowledge — the kind universities dispense freely — and specialized knowledge that can be applied to a specific, valuable purpose. Henry Ford had little formal education but surrounded himself with experts who possessed the knowledge he lacked.

Today, identify one skill directly linked to your income goal and invest in it systematically — through books, courses, mentors, or deliberate practice. Depth beats breadth when you are building toward a specific outcome.

5. Imagination: The Workshop of the Mind

Hill describes two forms of imagination. Synthetic imagination rearranges existing ideas into new combinations. Creative imagination receives flashes of inspiration that appear to come from beyond conscious thought. Most business breakthroughs — from Edison's phonograph to today's SaaS unicorns — begin with synthetic imagination applied persistently until creative insight arrives.

6. Organized Planning: The Crystallization of Desire into Action

A desire without a plan is a daydream. Hill urges readers to form a mastermind group (see below), create a definite plan, and begin immediately — even if the plan is imperfect. He notes that almost every successful plan requires adjustment along the way; the key is to act rather than wait for perfection.

Write a one-page action plan today. Identify three concrete tasks you can complete this week that move you toward your goal. Review and revise the plan monthly.

7. Decision: The Mastery of Procrastination

Hill found that every person he studied who had accumulated lasting wealth made decisions quickly and changed them slowly if at all. Conversely, people who failed tended to decide slowly and change their minds frequently. The lesson: gather the best available information, decide, and commit. Revisiting a decision daily is not prudence — it is disguised procrastination.

8. Persistence: The Sustained Effort Necessary to Induce Faith

Persistence is the bridge between desire and its physical equivalent. Hill treats it as a trainable habit, not an innate trait. He outlines four habits that build persistence: a definite purpose backed by burning desire; a definite plan expressed in continuous action; a mind closed tightly against negative influences; and a friendly alliance with one or more people who encourage you to follow through.

Every failure brings with it the seed of an equivalent advantage.

— Napoleon Hill, Think and Grow Rich

9. The Mastermind: The Driving Force

Hill defines the mastermind as a "coordination of knowledge and effort, in a spirit of harmony, between two or more people, for the attainment of a definite purpose." He believed two minds working in harmony create a third, invisible mind — a combined intelligence greater than the sum of its parts.

Practically: identify two to five people whose knowledge or experience complements yours, meet regularly with a shared agenda, and commit to mutual accountability. Modern masterminds thrive on video calls, shared dashboards, and quarterly in-person intensives.

10. The Mystery of Sex Transmutation

This is Hill's most controversial chapter, and also one of his most misunderstood. He is not advocating celibacy. He argues that sexual energy is among the most powerful human drives, and that the same intensity and creativity that characterizes romantic pursuit can be consciously redirected — transmuted — into creative, entrepreneurial, or artistic output. Channel strong emotion into your work, and the quality of that work rises.

11. The Subconscious Mind: The Connecting Link

Hill describes the subconscious as a filing system that stores every thought, feeling, and experience and acts on the dominant ones. Positive emotions — desire, faith, love, enthusiasm — are more powerful inputs than fear or doubt. He recommends deliberately saturating the subconscious with positive, goal-directed emotions through daily affirmation and visualization.

12. The Brain and the Sixth Sense

Hill viewed the brain as both a broadcasting and receiving station for thought vibrations — a framework more metaphorical than neuroscientific, but conceptually useful. He urged readers to quiet the conscious mind through meditation and reflection so that creative intuition — what he called the "sixth sense" or the "Temple of Wisdom" — could surface.

Translated into modern practice: build a daily stillness habit. Even ten minutes of unstructured quiet — without a phone — creates the mental space for insight that busy schedules suppress.

13. Overcoming the Six Ghosts of Fear

Hill closes the book by naming the six fears that most commonly prevent success:

1. Poverty — the most destructive of all, manifesting as procrastination, lack of ambition, and the habit of making excuses.
2. Criticism — causes people to run others down in order to hide their own inferiority.
3. Ill health — rooted in hypochondria and negative health suggestion.
4. Loss of love — produces jealousy, fault-finding, and gambling.
5. Old age — the tendency to slow down and develop an inferiority complex.
6. Death — often accompanied by religious uncertainty and worry about the afterlife.

The antidote Hill prescribes is self-analysis. He includes a lengthy questionnaire in the book. The exercise is uncomfortable — it is designed to be. Honest answers expose which ghosts are quietly governing your decisions.

Nearly 90 years after its publication, Think and Grow Rich endures not because it offers shortcuts, but because it maps the interior work that external success requires. The principles are not magic — they are disciplines. A burning desire clearly defined, a faith actively cultivated, a mastermind deliberately assembled, and fears honestly named and confronted: these are not relics of the 1930s. They are the timeless architecture of any life built on purpose.