Ideas

Subconscious Mind in The Master Key System

2026-10-10 · About 6 minutes

Charles Haanel gave the subconscious mind a starring role in The Master Key System. In his account it runs the body, stores memory, shapes habit, and connects each person to Universal Mind. He even gave it a physical home: the solar plexus. This page sets out what he actually wrote, then compares it with what modern psychology means when it talks about unconscious processes. Some of his observations hold up well. Others are beliefs that science does not support.

Quotations come from the public domain 1919 edition, with Part and paragraph numbers.

Two modes of mind

Part Two opens with the core idea: "The operations of the mind are produced by two parallel modes of activity, the one conscious, and the other subconscious." (II, 1) Haanel uses two pairs of names for these modes. The outward, changeable power is the "Conscious Mind" or "Objective Mind," and the inner power is the "Subconscious Mind" or "Subjective Mind" (II, 10). The objective and subjective wording was common in the popular psychology of his era, and he uses it freely.

The conscious mind

For Haanel the conscious mind works through the five senses. It reasons, compares and chooses, and it is "the seat of the will" (II, 12). Its most important job is to direct and protect the subconscious. He calls it "the watchman at the gate" of the subconscious domain (II, 14). When the watchman is off duty, during panic, anger or crowd excitement, he warns that the subconscious is left "open to suggestion from all sources" (II, 18).

The subconscious mind

The subconscious, in his description, does a huge amount of work without our noticing. It keeps the heart beating and the blood moving, it supplies "names, facts and scenes from the storehouse of memory" (II, 7), and it is "the seat of Habit" (II, 23). It never stops: "The subconscious mind never sleeps, never rests, any more than does your heart, or your blood." (II, 20)

He also says it cannot argue. It accepts what it is given and acts on it. That is why the conscious mind must choose its suggestions carefully, and why the cure for a bad habit of thought is "a strong counter-suggestion, frequently repeated" (II, 23). Finally, and this is where his account moves beyond psychology, he says the subconscious "is a part of the Universal Mind" (II, 27). That link is what gives it, in his system, creative power over circumstances.

The solar plexus idea

Haanel matched the two minds to two nervous systems. In Part One he writes that the brain is the organ of the objective mind, working through the cerebro-spinal nerves, while "The solar plexus is the organ of this mind," meaning the subconscious, working through the sympathetic system (I, 22). In Part Three he quotes Judge Thomas Troward on the same division and locates the solar plexus as "a ganglionic mass at the back of the stomach" (III, 2).

He then gives it a symbolic job. "The Solar Plexus has been likened to the sun of the body" (III, 5), a centre that radiates energy. Pleasant, courageous thought expands it and fearful thought contracts it: "Non-resistant thought expands the Solar Plexus; resistant thought contracts it." (III, 14) A person with strong radiation is what people call magnetic.

Interestingly, Haanel himself offers the reader a choice of language. He says that if you are religious, you can call this letting your light shine; if you lean toward physical science, you can wake the solar plexus; and "if you prefer the strictly scientific interpretation, I will say that you can impress your subconscious mind." (III, 21) That sentence is a useful key. It shows that for him the solar plexus was partly a way of talking about the same inner process in different vocabularies.

What modern psychology means by unconscious processes

Psychology today agrees with Haanel on one big point: most of what the mind does happens outside awareness. But the modern picture is different in shape.

  • It is many processes, not one mind. Psychologists describe a wide range of automatic processes: recognizing faces, understanding speech, keeping balance, retrieving words, forming habits. These are usually treated as separate systems working in parallel, not as a single hidden intelligence with its own will.
  • Body regulation is largely automatic. Haanel was right that heartbeat, breathing and digestion run without conscious control. Physiology attributes this to the autonomic nervous system and the brainstem, not to a mind with goals of its own.
  • Habit and practice are real. His remark that repeated actions become mechanical fits a long tradition in psychology. Skills and routines that start as effortful become automatic with repetition. This is one of the better supported parts of his account, though modern research describes it in terms of learning and memory rather than suggestion.
  • Memory works outside awareness. People are often influenced by past experience they cannot consciously recall, and solutions to problems sometimes arrive after a break. Haanel describes this vividly in Part Two. Psychology treats it as ordinary brain function, not as contact with something beyond the individual.
  • Freud's unconscious is another thing again. The psychoanalytic unconscious, with repressed wishes and conflicts, was developing around the same period. Haanel's subconscious is friendlier, more like "a benevolent stranger" (II, 3), and it does not draw on Freud.

Where the two pictures part ways

The clearest differences are worth stating plainly.

  1. The solar plexus is real anatomy, but not a mind. There is a solar plexus, also called the celiac plexus: a network of nerves in the upper abdomen that helps regulate the digestive organs. Haanel's own glossary describes it accurately as a nerve plexus. What anatomy does not support is the idea that it is the organ of a subconscious mind, or that thought makes it expand or contract.
  2. No link to a Universal Mind has been shown. The claim that the subconscious is part of a cosmic intelligence is a spiritual belief. Psychology has no method for testing it, and no finding that requires it.
  3. The "ninety per cent" claim is a myth. The Psychological Chart at the start of the course says "ninety per cent. of our mental power is never or seldom used." This is a version of the popular idea that we use only a small part of our brains. Brain imaging shows activity across the whole brain over the course of normal life. There is no large unused reserve waiting to be switched on.
  4. Suggestion has limits. Haanel says the subconscious accepts any suggestion as true and acts on it. Research on suggestion, placebo responses and expectation shows real but bounded effects. Repeating a statement to yourself does not reliably rewrite your circumstances.

What still holds up for readers

Strip away the metaphysics and some of Haanel's practical advice lines up with common sense and broad findings in psychology. Paying attention to the thoughts you rehearse, guarding your judgment when you are angry or frightened, practicing a new habit until it becomes automatic, and stepping away from a problem so a solution can surface are all reasonable things to do.

The exercises in the early Parts, starting with the sitting exercise, ask the reader to sit still, notice how many thoughts arise, and then relax the body. Today we would call this a form of attention training or simple meditation. Research on meditation is an active field with mixed and often modest results, so it is fair to call these exercises worth trying without promising more than they deliver.

The fair summary is this. Charles Haanel saw correctly that much of mental life runs below awareness, and he wrote about it in a way that still encourages people to take their habits of thought seriously. His specific claims about the solar plexus and a subconscious joined to Universal Mind belong to his belief system, not to the evidence.

References

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