THE ARTICLE · 6 MIN
As a Man Thinketh is James Allen’s short book on the power of thought, which the introduction to a 2019 edition says “is credited with being one of the first popular ‘self-help’ books”. Here are its big ideas in our own words, what the Bible verse in its title says, which of its claims research supports in a narrower form, where it goes further than the evidence, and a few small practices drawn from the parts that hold up.
About the book
According to the introduction to a 2019 St. Martin’s edition, Allen was born in Leicester, England, in 1864, worked long hours as a framework knitter, read the writers of the New Thought movement, and died in 1912. The same introduction says the book was “initially published in 1903” and was his third.
It is very short: about 7,500 words in seven sections, from “Thought and Character” to “Serenity”. The book is in the public domain, so we read all of it, in the Project Gutenberg text (eBook #4507), an undated “Authorized Edition” published in New York whose foreword Allen signed from Ilfracombe, England.
The big ideas
1. Thought makes character
Allen opens with the line he took for his title and pushes it as far as it will go: every act “springs from the hidden seeds of thought”, and character is “the complete sum” of a person’s thoughts.
2. The mind is a garden
His central picture is a garden that “must, and will, bring forth”: if no useful seeds are put in, weeds grow. The work is to tend it, weeding out some thoughts and cultivating others.
3. Circumstances follow thought
Allen argues that outer conditions are “harmoniously related” to a person’s inner state, and that “a man cannot directly choose his circumstances, but he can choose his thoughts, and so indirectly, yet surely, shape his circumstances.” He adds a caution of his own: a person’s inner state “cannot be judged by another from the external aspect of his life alone.”
4. The body follows thought
The health chapter makes the book’s strongest claims: “Disease and health, like circumstances, are rooted in thought,” and “Change of diet will not help a man who will not change his thoughts.”
5. Purpose and effort
Without purpose, he says, thought drifts. He asks for a “central purpose”, or failing that, the “faultless performance” of everyday duties, and he treats failure as part of the process: “the strength of character gained” counts even when a purpose is missed.
6. Vision, then work
“Dream lofty dreams,” he writes, but he also insists that “the strength of the effort is the measure of the result,” and he describes people who look at someone’s success and call it luck without seeing “the trials and failures and struggles” behind it.
7. Serenity
The book ends on calm as a skill learned over time: “Calmness of mind is one of the beautiful jewels of wisdom. It is the result of long and patient effort in self-control.”
What holds up
Some of Allen’s claims are statements about the mind that research has tested in narrower forms, and the rows above show where they meet the evidence and where they part from it. Two points need more room.
Where the book and the research part ways
The research findings are about odds and averages: stress was linked to higher infection rates, optimism to lower heart risk, and expectations to effort. Allen states laws: “Good thoughts and actions can never produce bad results,” and “Suffering is always the effect of wrong thought in some direction.” No study we found supports those absolutes, and the large US study of family income above suggests that where people start counts for a good deal. Repeating positive statements about yourself, a practice close to the book’s ideas, also has mixed evidence: a 2009 study found it left people with low self-esteem feeling worse, and two 2020 replications found no difference between conditions. Our article on affirmations covers that research and the law of attraction, an idea close to Allen’s line “The soul attracts that which it secretly harbours”, which has no scientific support.
Expectation is not the same as fantasy
One finding is especially relevant to this book: the split in Oettingen and Mayer’s studies, which followed people looking for jobs, students with a crush, students before an exam and patients having hip replacements, for weeks to two years. Believing a good outcome was likely went with more effort and better results; enjoying daydreams about it went with less. Allen’s own text contains both: the dreams, and the insistence on effort.
How to use it
These practices come from the parts that hold up. They describe what people do; what fits your situation is your call. Nothing here is medical advice.
- Separating hope from expectation. After picturing a goal, some people ask a second question: how likely is it, and what would they have to do? That is the line the expectation studies drew.
- Treating the book’s health claims as claims. Stress and outlook are linked to health in research, but as risks and averages, not as a law that makes illness the sufferer’s fault.
- Reading the verse around a quotation. The title shows how a line can change meaning once it leaves its passage; reading the verses around it takes a minute.
Who it’s for, and who can skip it
It suits readers who want a short, devotional book about attention and character, and anyone curious about where modern self-help language comes from. It is written as moral teaching, not argument, and it places responsibility for poverty and illness on the person’s own thoughts: “A man does not come to the almshouse or the jail by the tyranny of fate or circumstance,” and “The people who live in fear of disease are the people who get it.” Readers who are ill, or caring for someone who is, may find those passages hard. Readers can weigh them for themselves. The chapter on serenity is the gentlest place to start.
If you liked this
- The Science Behind Affirmations: what research found about positive self-statements, and where the law of attraction fits.
- Mindset, summarised: a modern book about beliefs and effort, checked against the research.
- Self-Reliance, summarised: Emerson’s essay on trusting your own mind, from sixty years earlier.
Sources
- James Allen, As a Man Thinketh, Project Gutenberg eBook #4507.
- Joel Fotinos, introduction to As a Man Thinketh: The Complete Original Edition (St. Martin’s Essentials, 2019), excerpt on the publisher’s page.
- The King James Bible, Proverbs 23:6–8, Project Gutenberg eBook #10; New Revised Standard Version, Proverbs 23:6–8, oremus Bible Browser.
- Raj Chetty, Nathaniel Hendren, Patrick Kline and Emmanuel Saez, “Where is the Land of Opportunity?”, NBER Working Paper 19843 (2014).
- Sheldon Cohen, David Tyrrell and Andrew Smith, “Psychological stress and susceptibility to the common cold”, New England Journal of Medicine 325, 606–612 (1991), abstract.
- Asbjørn Hróbjartsson and Peter Gøtzsche, “Placebo interventions for all clinical conditions”, Cochrane Database of Systematic Reviews (2010), abstract.
- Alan Rozanski et al., “Association of Optimism With Cardiovascular Events and All-Cause Mortality”, JAMA Network Open 2(9) (2019), abstract.
- Gabriele Oettingen and Doris Mayer, “The motivating function of thinking about the future”, Journal of Personality and Social Psychology 83(5), 1198–1212 (2002), abstract.
- Joanne V. Wood, W. Q. Elaine Perunovic and John W. Lee, “Positive self-statements: power for some, peril for others”, Psychological Science 20(7) (2009), abstract; Maureen K. Flynn and Michael J. Bordieri, “On the failure to replicate past findings regarding positive affirmations and self-esteem”, Journal of Contextual Behavioral Science 16 (2020), abstract.
Checked October 2026. What we read: the whole of As a Man Thinketh in the Project Gutenberg text (eBook #4507); the publisher’s page for the 2019 edition, including its introduction; Proverbs 23 in the King James Version and the NRSV; and the abstracts of the studies listed above, not the full papers.
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