Works
Mental Chemistry by Charles Haanel: A Reader's Guide (1922)
Mental Chemistry is the first book Charles Haanel published after The Master Key System. It appeared in 1922, from Haanel himself in St. Louis, when he was in his mid-fifties. Where the earlier course was a set of weekly lessons with exercises, Mental Chemistry is a book of essays. It takes the ideas of the course and frames them through one central comparison: that the mind combines thoughts the way chemistry combines elements, and that the results are just as predictable.
This guide explains what the book says, how it is organized, how it connects to Haanel's other work, and which of its claims are history and which are belief. Quotations come from a public domain text of the book.
The central idea
The book opens with a series of definitions. Chemistry, Haanel writes, deals with the changes material things undergo. "Mental" refers to the mind. Putting the two together, he arrives at his title:
Mental chemistry is, therefore, the science which treats of the changes which material conditions undergo through the operations of the mind, verified by exact observation and correct thinking.
He then draws the comparison out. One atom of sodium and one of chlorine make salt, and no other combination will. In the same way, he argues, a given thought will always be followed by the same consequence. The ten digits can form any number and the alphabet can spell any thought, so the right combination of mental elements can, in his view, produce any condition a person needs.
Behind this sits the same picture of the universe found in the course. Haanel describes a Universal Mind, an intelligence that "pervades all space and animates all living things," and calls it the "Universal Chemist." Individual thinking, in his account, acts on this universal intelligence, and the results show up as the conditions and experiences of a person's life.
How the book is organized
After its opening definitions, the book runs through a series of short chapters. The public domain text examined for this guide has these headings, in order:
- The Chemist
- The Laboratory
- Attraction
- Vibration
- Transmutation
- Attainment
- Industry
- Economics
- Medicine
- Mental Medicine
- Orthobiosis
- Biochemistry
- Suggestion
- Psycho-Analysis
- Psychology
- Metaphysics
- Philosophy
- Silence
- Religion
A short piece titled "Promise Yourself" sits between "Attainment" and "Industry." Different modern editions may number or group these sections differently, so readers comparing printings should not be surprised by small variations.
What the chapters cover
The body as a chemical works
The early chapters, "The Chemist" and "The Laboratory," describe the body as a community of living cells and a set of glands producing chemical agents. Haanel draws on writers on the ether and on the biology of his day, quoting figures such as Huxley and Haeckel, and he uses this material to argue that intelligence runs through all living matter down to the cell.
Attraction and vibration
The middle chapters restate the core teaching of the course. Thought is described as vibration, and like attracts like. These chapters are where readers will find Haanel's version of the law of attraction in essay form rather than lesson form.
Economics and current events
One feature that sets Mental Chemistry apart is how closely it is tied to its own moment. The "Economics" chapter quotes speeches in the United States Senate about the chemical industry, reflects on the dead of the First World War, and describes the collapse of the German mark, citing the number of marks issued in a week of November 1922. These passages date the book clearly and show Haanel writing as a businessman watching the post-war economy.
Mind and medicine
Several chapters, including "Medicine," "Mental Medicine," "Orthobiosis," "Biochemistry" and "Suggestion," deal with health. Haanel surveys ideas popular in the early 1920s: the study of the ductless glands, the cell salts of Dr. Schuessler, the auto-suggestion method of Emile Coué, and Elie Metchnikoff's idea of "orthobiosis," a rightly lived life. He presents these alongside his own view that mental states shape the body.
The subconscious
Haanel's account of the subconscious mind is one of the clearest in his writing. He uses the example of a child learning the piano, who must at first think about every finger but later plays while talking, because the movements have passed into the subconscious. He adds a firm rule: "The subconscious cannot take the initiative." In his view it carries out what the conscious mind suggests, which is why conscious thinking matters so much.
Silence and religion
The book closes with chapters on philosophy, silence and religion. Haanel argues that prayer works through law rather than favor, that the same cause under the same conditions always gives the same effect, and that an understanding of this law places religion on what he calls a scientific footing. The final pages call for religions to cooperate rather than compete.
How it relates to The Master Key System
Readers who know The Master Key System will recognize much of Mental Chemistry. Some passages appear in both nearly word for word, including the description of mental action as the interaction of the individual upon the Universal Mind. The "Vibration" chapter opens with paragraphs that closely follow the first part of a 1919 Master-Key booklet Haanel printed in St. Louis, beginning with the claim that before any environment can be created, there must first be thought. The difference is mainly one of form. The course is a training program with weekly exercises such as the sitting exercise and practices in visualization and concentration. Mental Chemistry has no weekly drills. It is meant to be read and thought about, and it spends far more space on science, medicine and public affairs.
The material also traveled into other books. An Internet Archive scan of a 1923 St. Louis book titled Cause and Effect, credited "By the Author of The Master Key System," carries copyright dates of 1922 and 1923 and shares most of its chapter headings with Mental Chemistry. Its chapter on attraction opens with almost the same sentence, with "Attraction" in place of "Mental chemistry." How the two books relate, whether as a retitling or a revision, is not clear from the scan. Haanel's later book The New Psychology (1924) also reuses chapter titles from Mental Chemistry, including "Mental Medicine," "Orthobiosis" and "Biochemistry."
History and belief
History: Haanel published Mental Chemistry in St. Louis in 1922. It is part of the New Thought literature of the period and is now in the public domain in the United States.
Belief: the book's main claims, that thought works like a chemical reaction on circumstances, that a Universal Mind acts as a chemist, and that right thinking heals, are statements of Haanel's philosophy. They are not findings of chemistry or medicine.
Dated science: Haanel reports experiments and theories he read about, such as claims about the ether, or about guinea pigs and the chemistry of anger, attributed to Elmer Gates. These reflect the popular science of his time and should not be taken as current knowledge. The health chapters in particular are a record of 1920s ideas, not medical guidance.
Reading it today
Mental Chemistry is a good second book for readers who have worked through the course and want to see how Haanel explained his ideas at greater length. It is also useful as a historical document: a window onto how a New Thought writer in 1922 tried to bring together business, popular science, medicine and religion under one theory of mind. Read with that context in mind, it shows both the confidence and the limits of the movement it came from.
References
- Charles F. Haanel on Wikipedia
- New Thought on Wikipedia
- Positive thinking on Wikipedia