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A Theory of Happiness: Lessons from a 100 year old Korean Philosopher THE INTERNATIONAL BESTSELLER
**Over 50,000 copies sold**
What does real happiness look like? How can we find true purpose, meaning and connection in our finite time on Earth?
105-year-old Professor Kim reveals key aspects of ancient Korean philosophy and shares stories from over a century of living to help us live better.
Showing us how to lean into the world with more softness, gratitude, openness and sincerity – especially when confronted with life's challenges – he invites us to discover the everyday lessons we can take from Korean values, giving invaluable insight
how to find the happiness that already exists in our daily lives
how we can cultivate happiness through hard work and personal growth
how to nurture happiness in our closet relationships
how we can enjoy happiness that grows with us as we age and mature.
The answers to finding genuine, long-lasting happiness in life are more straightforward than we think.
What does real happiness look like? How can we find true purpose, meaning and connection in our finite time on Earth?
105-year-old Professor Kim reveals key aspects of ancient Korean philosophy and shares stories from over a century of living to help us live better.
Showing us how to lean into the world with more softness, gratitude, openness and sincerity – especially when confronted with life's challenges – he invites us to discover the everyday lessons we can take from Korean values, giving invaluable insight
how to find the happiness that already exists in our daily lives
how we can cultivate happiness through hard work and personal growth
how to nurture happiness in our closet relationships
how we can enjoy happiness that grows with us as we age and mature.
The answers to finding genuine, long-lasting happiness in life are more straightforward than we think.
208 pages, Hardcover
Published May 19, 2026
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Displaying 1 - 20 of 20 reviews
April 29, 2026
War ganz süß, aber wenig überraschend nichts Bahnbrechendes. Viele Sachen können wir nicht kontrollieren, viele sind eine Frage der Perspektive. Manche, ich nenne sie mal Kurzgeschichten, fand ich nachvollziehbarer als andere, aber lived experience ist natürlich auch immer unterschiedlich.
In the end, the old man did not fix me up, aber immerhin hat er es versucht🦖
In the end, the old man did not fix me up, aber immerhin hat er es versucht🦖
July 29, 2026
This is such a beautiful book
Sitting with a centenarian pondering life 🤍
Sitting with a centenarian pondering life 🤍
March 10, 2026
One of the best self help books of recent times. A must read.
May 26, 2026
Concepts
* **The Present-Process Model of Happiness:** Happiness is not a static future destination, but a fleeting passage found only in the present moment and the process of striving. *Evidence:* Reaching a goal instantly (like being dropped at a mountain peak) eliminates the joy of the ascent; true happiness requires the physical and mental climb.
* **The Utility of Suffering:** Hardship is functional and necessary for human development. *Evidence:* Overcoming adversity builds noble character, shared pain deepens empathy and love for others, and extreme suffering often acts as a catalyst for transformative life changes.
* **The "Becoming" vs. "Doing" Paradigm:** "Becoming" reflects passive growth and acceptance of natural cycles, while "Doing" represents active creation and human ambition. *Evidence:* Societies and individuals must embrace the courage to "do" to unlock their infinite potential, as relying solely on "becoming" leads to fatalism and stagnation.
* **Character-Wealth Capacity Ratio:** Wealth without the prerequisite character leads to misery and societal harm. *Evidence:* A person with a "40-point character" who inherits "80 points of wealth" will fail to manage it and bring misfortune upon themselves, because their character capacity cannot hold that level of resources.
* **Death as Life's Completion:** Death is not merely the cessation of biological function, but the structural end that gives a life story its final meaning. *Evidence:* Just as an artist finishes a painting by laying down the brush, death finalises an individual's legacy, transitioning their life's work into an enduring spiritual or cultural inheritance for society.
* **The Primacy of Mental Resilience in Aging:** After the age of forty, psychological fortitude becomes the primary driver of physical health. *Evidence:* While physical fitness matters, it is emotional stamina and a positive worldview that prevent the fatal physical consequences of stress and despair in later life.
**Actionable Steps**
* **Operate Below Maximum Capacity:** If your maximum capacity is 100 units, commit only to 90. *Why:* Overexertion causes physical and mental breakdowns that halt productivity; pacing yourself ensures longevity and often naturally results in achieving 120 units over time.
* **Enforce Strict Spatial Boundaries for Work:** Keep work at the workplace and do not bring professional tasks into the home. *Why:* Blurring these boundaries destroys mental rest; separating your professional and private spaces is necessary to maintain psychological balance and sustain creative output over a lifetime.
* **Cultivate Cross-Disciplinary Hobbies:** Adopt hobbies completely distinct from your primary profession. *Why:* Those engaged in mental labour require physical hobbies, and physical labourers require intellectual hobbies to relieve specific fatigue, ensure balanced personal growth, and prevent the loss of humanity caused by repetitive work.
* **Engage in Moderate, Solitary Exercise:** Choose gentle, self-paced physical activities like walking or swimming over competitive sports or machine-based exercises. *Why:* Competitive sports focus on winning rather than the activity itself, and heavy exertion causes bodily wear; moderate exercise preserves joints and cardiovascular health into old age without creating unnecessary stress.
* **Teach Social Responsibility over Wealth:** Restrict unconditional financial support (like full tuition or large allowances) when raising children. *Why:* Depriving children of financial challenges prevents them from developing financial independence and the necessary character to handle wealth, making them selfish and vulnerable to ruin.
* **Investigate the Intellectual Foundations of Your Work:** Do not perform tasks blindly; actively study the mechanics, context, and ultimate purpose of your daily duties. *Why:* Understanding the "why" behind an operation fuels innovation, improves efficiency, and transforms repetitive manual or clerical labour into an avenue for professional advancement.
* **Transition Relationships from Emotion to Character:** Do not rely on romantic passion to sustain long-term relationships. *Why:* Emotions are volatile and easily exhausted; lasting partnerships must be deliberately shaped by rational judgment, shared social responsibilities, and mutual respect to survive.
* **The Present-Process Model of Happiness:** Happiness is not a static future destination, but a fleeting passage found only in the present moment and the process of striving. *Evidence:* Reaching a goal instantly (like being dropped at a mountain peak) eliminates the joy of the ascent; true happiness requires the physical and mental climb.
* **The Utility of Suffering:** Hardship is functional and necessary for human development. *Evidence:* Overcoming adversity builds noble character, shared pain deepens empathy and love for others, and extreme suffering often acts as a catalyst for transformative life changes.
* **The "Becoming" vs. "Doing" Paradigm:** "Becoming" reflects passive growth and acceptance of natural cycles, while "Doing" represents active creation and human ambition. *Evidence:* Societies and individuals must embrace the courage to "do" to unlock their infinite potential, as relying solely on "becoming" leads to fatalism and stagnation.
* **Character-Wealth Capacity Ratio:** Wealth without the prerequisite character leads to misery and societal harm. *Evidence:* A person with a "40-point character" who inherits "80 points of wealth" will fail to manage it and bring misfortune upon themselves, because their character capacity cannot hold that level of resources.
* **Death as Life's Completion:** Death is not merely the cessation of biological function, but the structural end that gives a life story its final meaning. *Evidence:* Just as an artist finishes a painting by laying down the brush, death finalises an individual's legacy, transitioning their life's work into an enduring spiritual or cultural inheritance for society.
* **The Primacy of Mental Resilience in Aging:** After the age of forty, psychological fortitude becomes the primary driver of physical health. *Evidence:* While physical fitness matters, it is emotional stamina and a positive worldview that prevent the fatal physical consequences of stress and despair in later life.
**Actionable Steps**
* **Operate Below Maximum Capacity:** If your maximum capacity is 100 units, commit only to 90. *Why:* Overexertion causes physical and mental breakdowns that halt productivity; pacing yourself ensures longevity and often naturally results in achieving 120 units over time.
* **Enforce Strict Spatial Boundaries for Work:** Keep work at the workplace and do not bring professional tasks into the home. *Why:* Blurring these boundaries destroys mental rest; separating your professional and private spaces is necessary to maintain psychological balance and sustain creative output over a lifetime.
* **Cultivate Cross-Disciplinary Hobbies:** Adopt hobbies completely distinct from your primary profession. *Why:* Those engaged in mental labour require physical hobbies, and physical labourers require intellectual hobbies to relieve specific fatigue, ensure balanced personal growth, and prevent the loss of humanity caused by repetitive work.
* **Engage in Moderate, Solitary Exercise:** Choose gentle, self-paced physical activities like walking or swimming over competitive sports or machine-based exercises. *Why:* Competitive sports focus on winning rather than the activity itself, and heavy exertion causes bodily wear; moderate exercise preserves joints and cardiovascular health into old age without creating unnecessary stress.
* **Teach Social Responsibility over Wealth:** Restrict unconditional financial support (like full tuition or large allowances) when raising children. *Why:* Depriving children of financial challenges prevents them from developing financial independence and the necessary character to handle wealth, making them selfish and vulnerable to ruin.
* **Investigate the Intellectual Foundations of Your Work:** Do not perform tasks blindly; actively study the mechanics, context, and ultimate purpose of your daily duties. *Why:* Understanding the "why" behind an operation fuels innovation, improves efficiency, and transforms repetitive manual or clerical labour into an avenue for professional advancement.
* **Transition Relationships from Emotion to Character:** Do not rely on romantic passion to sustain long-term relationships. *Why:* Emotions are volatile and easily exhausted; lasting partnerships must be deliberately shaped by rational judgment, shared social responsibilities, and mutual respect to survive.
This entire review has been hidden because of spoilers.
April 29, 2026
Professor Kim’s century of lived experience gives this book a warmth and authenticity that’s hard to manufacture. His storytelling is gentle and moving, and his core message that happiness lives in the present, in love and simple moments, is genuinely beautiful.
It won’t satisfy readers looking for deep philosophical rigor, and some ideas feel familiar. But as a soft, unhurried reminder of what actually matters, it more than earns its place on the shelf.
It won’t satisfy readers looking for deep philosophical rigor, and some ideas feel familiar. But as a soft, unhurried reminder of what actually matters, it more than earns its place on the shelf.
Review of advance copy received from Publisher
Reviewed by Trish Palmer for Bluewolf Reviews and Bloomsbury Publishing.
Professor Kim Hyung Seok speaks to us of happiness from the perspective of an elderly and sharp mind. He has designed A Theory of Happiness so he can tell stories which outline the point he is making.
He recalls a time when he was at school and the Japanese had invaded Korea; his Headmaster was allowed to give a farewell speech. He was being removed because he hadn’t changed the curriculum. The headmaster stood on the stage, raised his fist and shouted, “ACT.” The boys were stunned but later became aware of the significance of his defiance.
Kim also believes that happiness is in the present. He suggests we don’t look for happiness in the future, or the past, but enjoy the moments we have day to day. He tells the story of a factory worker and his wife. The man loved art and so each weekend he and his wife would go to a park where he could paint, and she could read her books. The children played and moved between the parents. His point is that wealth is not necessary for a happy life.
Love is also a focus of Kim’s work. He says, “Where there is no love, happiness cannot dwell.” Initially Kim felt that Justice was the most important factor for world harmony but later he believed that it was love that was the epicentre of all happiness and peace.
Reading the stories that Kim has written, we see examples of how his explanations can be used to enhance his case. He insists that a cultural awareness is necessary for an understanding of life and we should all take the time to read and explore uplifting activities.
Professor Kim Hyung Seok speaks to us of happiness from the perspective of an elderly and sharp mind. He has designed A Theory of Happiness so he can tell stories which outline the point he is making.
He recalls a time when he was at school and the Japanese had invaded Korea; his Headmaster was allowed to give a farewell speech. He was being removed because he hadn’t changed the curriculum. The headmaster stood on the stage, raised his fist and shouted, “ACT.” The boys were stunned but later became aware of the significance of his defiance.
Kim also believes that happiness is in the present. He suggests we don’t look for happiness in the future, or the past, but enjoy the moments we have day to day. He tells the story of a factory worker and his wife. The man loved art and so each weekend he and his wife would go to a park where he could paint, and she could read her books. The children played and moved between the parents. His point is that wealth is not necessary for a happy life.
Love is also a focus of Kim’s work. He says, “Where there is no love, happiness cannot dwell.” Initially Kim felt that Justice was the most important factor for world harmony but later he believed that it was love that was the epicentre of all happiness and peace.
Reading the stories that Kim has written, we see examples of how his explanations can be used to enhance his case. He insists that a cultural awareness is necessary for an understanding of life and we should all take the time to read and explore uplifting activities.
June 7, 2026
Thank you, Bloomsbury, for sending me A Theory of Happiness: Lessons from a 100 Year Old Korean Philosopher. As someone who rarely reaches for nonfiction, I appreciated how accessible this book felt. Divided into four thoughtful sections, it explores happiness, personal growth, love, and the completion of life through short, reflective chapters that are easy to read yet often leave you thinking long after you've finished them. What stood out most was the author's belief that happiness is not a destination but something we experience while moving through life, one step at a time.
What makes this book memorable is not just its advice but the life behind it. Written by a philosopher who has lived through more than a century of change, the book draws from experience rather than theory. Some ideas may feel familiar if you read a lot of self help or philosophy, but the warmth, sincerity, and gentle reflections on work, relationships, aging, and purpose give them a different kind of weight. I especially enjoyed the shorter chapters on honesty, humility, friendship, and living a meaningful life.
✨ Three takeaways:
• Happiness is found in the process of living, not only in reaching goals.
• Small acts of kindness, humility, and service often create the most meaningful life.
• Life's uncertainty may never have clear answers, but continuing to bring joy and help to others is a purpose worth pursuing.
What makes this book memorable is not just its advice but the life behind it. Written by a philosopher who has lived through more than a century of change, the book draws from experience rather than theory. Some ideas may feel familiar if you read a lot of self help or philosophy, but the warmth, sincerity, and gentle reflections on work, relationships, aging, and purpose give them a different kind of weight. I especially enjoyed the shorter chapters on honesty, humility, friendship, and living a meaningful life.
✨ Three takeaways:
• Happiness is found in the process of living, not only in reaching goals.
• Small acts of kindness, humility, and service often create the most meaningful life.
• Life's uncertainty may never have clear answers, but continuing to bring joy and help to others is a purpose worth pursuing.
July 12, 2026
Life is not a road that leads to death but a path to completion. Death does not rob us of everything but gives our lives an ending that completes the story of our lives. The complete story is the legacy we leave after we are gone."
A theory of happiness written by a professor is an interesting and easy to understand book about what it means to live a happy life. The author explains that happiness is not only about money or success but also about having good relationships, a positive attitude, and a sense of purpose.
The book uses simple examples and practical ideas that readers can apply in their daily lives. It encourages people to be grateful, stay hopeful, and focus on what truly matters.
I liked the book because it is inspiring and gives useful advice for everyday life. The language is clear, so it is suitable for many readers.
A Theory of Happiness is a thoughtful and motivating book. I would recommend it to anyone who wants to learn simple ways to become happier and live a more meaningful life.
A theory of happiness written by a professor is an interesting and easy to understand book about what it means to live a happy life. The author explains that happiness is not only about money or success but also about having good relationships, a positive attitude, and a sense of purpose.
The book uses simple examples and practical ideas that readers can apply in their daily lives. It encourages people to be grateful, stay hopeful, and focus on what truly matters.
I liked the book because it is inspiring and gives useful advice for everyday life. The language is clear, so it is suitable for many readers.
A Theory of Happiness is a thoughtful and motivating book. I would recommend it to anyone who wants to learn simple ways to become happier and live a more meaningful life.
May 19, 2026
I feel like this book does not translate well across cultures or generations. I do find some points important like living in the present and finding joy and happiness in the present. Or eating healthy foods and exercise. But saying people past 60 should not exercise heavily if quite wrong. I also do not think we are put on earth for our work to be our be all end all. There is so much more to life. I found the stories told interesting too as I did not feel they always fit the chapter. This is why I am wondering if this book does not translate well. I am bummed to have purchased a hard copy of this book and to have spent the money doing so. It was an easy read so the time spent reading it was just a few hours.
This entire review has been hidden because of spoilers.
September 20, 2026
4.5/5⭐️
Dieses Buch hatte einen Inhalt, der für mich perfekt zum Cover passt. Diese warmen Farben, die Positivität und Dankbarkeit für das Dasein und die Natur, dass die Sonne jeden Tag aufgeht und wir leben.
Es gab zwar keine riesigen neuen Erkenntnisse, aber der Schreibstil von Kim Hyung-Seok ist fesselnd und poetisch, aber doch sehr verständlich. Die Anekdoten haben mich sehr berührt.
Die Tipps die er gegeben hat, waren alle auf einer sehr spirituellen, geistigen Ebene und weniger, was man in seinem Leben physisch verändern kann. Dennoch hat dieses Buch in mir so viel Bewusstsein und Dankbarkeit ausgelöst, ich fand es wunderschön.🩷
Dieses Buch hatte einen Inhalt, der für mich perfekt zum Cover passt. Diese warmen Farben, die Positivität und Dankbarkeit für das Dasein und die Natur, dass die Sonne jeden Tag aufgeht und wir leben.
Es gab zwar keine riesigen neuen Erkenntnisse, aber der Schreibstil von Kim Hyung-Seok ist fesselnd und poetisch, aber doch sehr verständlich. Die Anekdoten haben mich sehr berührt.
Die Tipps die er gegeben hat, waren alle auf einer sehr spirituellen, geistigen Ebene und weniger, was man in seinem Leben physisch verändern kann. Dennoch hat dieses Buch in mir so viel Bewusstsein und Dankbarkeit ausgelöst, ich fand es wunderschön.🩷
This entire review has been hidden because of spoilers.
May 12, 2026
A very well written book which throws light on daily issues from which one can derive so many beautiful lessons for life. It shows the ways wherein we can find happiness that already exists in our daily lives but somehow we fail to notice. Various issues related to life and, the associated happiness with it, that grows with human beings as they age and mature. Last part of the book “ The Night Train of Life” sums up the kind of life which a human being should live so as to be of some use to others. A highly recommended book for people of all ages.
July 4, 2026
Good read! The author explains the perception of happiness through all ages with help of very apt incidents from his life, and subtle anecdotes. The gist being to keep exercising to maintain happiness in late years of life!
Regards,
A
Regards,
A
Review of advance copy
When a hundred year old philosopher writes a book on life …. One doesn’t need to think but just read
May 23, 2026
I've read other books on this topic, written by older authors who bring wisdom and life experience to the topic. There is nothing new in this one but it was well-written.
June 1, 2026
I can't say how much I loved this book. Everyone says the lessons have been told before and many times but maybe that's the point. The lessons don't need changing but need reiterating
June 14, 2026
Not for me
August 3, 2026
A book written by a 105 year old centenarian. 🙌🏻 Can't help but be amazed over that fact. Reading this made me reflect a lot about life, pursuing hobbies and keeping a healthy lifestyle.
August 8, 2026
I wish I had read this when I was younger, but it offers great inspiration for a happier older age. I feel as though this book will return to my thoughts for quite some time.
October 7, 2026
Good reminders and awakening triggers
April 16, 2026
Didn’t really grab me.
Displaying 1 - 20 of 20 reviews