What Is Happiness and Why Is It Important?

What is happiness theory

What is happiness?

It seems like an odd question, but is it? Do you know how to define happiness? Do you think happiness is the same thing to you as it is to others?

What’s the point of it all? Does it even make a difference in our lives?

In fact, happiness does have a pretty important role in our lives, and it can have a huge impact on the way we live our lives. Although researchers have yet to pin down the definition or an agreed-upon framework for happiness, there’s a lot we have learned in the last few decades.

This article will dive into the science of happiness, what it actually is, and why it matters.

Before you continue, we thought you might like to download our three Positive Psychology Exercises for free. These science-based exercises will explore fundamental aspects of positive psychology including strengths, values, and self-compassion, and will give you the tools to enhance the wellbeing of your clients, students, or employees.

A Look at the Oxford English Dictionary‘s Definition of Happiness

First, let’s take a look at the definition of happiness so we’re all on the same page. Oxford English Dictionary’s definition of “happiness” is a simple one: “The state of being happy.”

Not exactly what we were looking for, was it? Perhaps we need to dive a little deeper. Oxford English Dictionary’s definition of “happy” is a little more helpful: “Feeling or showing pleasure or contentment.”

That’s better! So, happiness is the state of feeling or showing pleasure or contentment. From this definition, we can glean a few important points about happiness:

  1. Happiness is a state, not a trait; in other words, it isn’t a long-lasting, permanent feature or personality trait, but a more fleeting, changeable state.

  2. Happiness is equated with feeling pleasure or contentment, meaning that happiness is not to be confused with joy, ecstasy, bliss, or other more intense feelings.

  3. Happiness can be either feeling or showing, meaning that happiness is not necessarily an internal or external experience, but can be both.

Now we have a better grasp on what happiness is—or at least, how the Oxford English Dictionary defines what happiness is. However, this definition is not the end-all, be-all definition of happiness. In fact, the definition of happiness is not a “settled” debate.


What is the Meaning of Happiness in Positive Psychology?

Couples and Happiness as a Social Component.The meaning of happiness in Positive Psychology really depends on who you ask.

Happiness is often known by another name in positive psychology research: subjective wellbeing, or SWB.

Some believe happiness is one of the core components of SWB, while others believe happiness is SWB. Regardless, you’ll frequently find SWB used as a shorthand for happiness in the literature.

And speaking of the literature, you will find references to SWB everywhere. A quick Google search for the word “happiness” offers over 2 million results (as of January 6th, 2019). Further, a scan for the same term in two of psychology’s biggest online databases (PsycINFO and PsycARTICLES) returns 19,139 results from academic and other journals, books, dissertations, and more.


Is it difficult to define scientifically?

With so many takes on happiness, it’s no wonder that happiness is a little difficult to define scientifically; there is certainly disagreement about what, exactly, happiness is.

According to researchers Chu Kim-Prieto, Ed Diener, and their colleagues (2005), there are three main ways that happiness has been approached in positive psychology:

  1. Happiness as a global assessment of life and all its facets;
  2. Happiness as a recollection of past emotional experiences;
  3. Happiness as an aggregation of multiple emotional reactions across time (Kim-Prieto, Diener, Tamir, Scollon, & Diener, 2005).

Although they generally all agree on what happiness feels like—being satisfied with life, in a good mood, feeling positive emotions, feeling enjoyment, etc.—researchers have found it difficult to agree on the scope of happiness.

However, for our purposes in this piece, it’s enough to work off of a basic definition that melds the OED‘s definition with that of positive psychologists: happiness is a state characterized by contentment and general satisfaction with one’s current situation.


Pleasure vs. happiness

With the close ties between pleasure and happiness, you might be wondering how to differentiate between them. After all, the OED definition of happiness describes it as a state of feeling pleasure!

The association between the two makes sense, and it’s common to hear the two words used interchangeably outside of the literature; however, when it comes to the science of positive psychology, it is important to make a distinction between the two.

Happiness, as we described above, is a state characterized by feelings of contentment and satisfaction with one’s life or current situation. On the other hand, pleasure is a more visceral, in-the-moment experience. It often refers to the sensory-based feelings we get from experiences like eating good food, getting a massage, receiving a compliment, or having sex.

Happiness, while not a permanent state, is a more stable state than pleasure. Happiness generally sticks around for longer than a few moments at a time, whereas pleasure can come and go in seconds (Paul, 2015).

Pleasure can contribute to happiness, and happiness can enhance or deepen feelings of pleasure, but the two can also be completely mutually exclusive. For example, you can feel a sense of happiness based on meaning and engagement that has nothing to do with pleasure, or you could feel pleasure but also struggle with guilt because of it, keeping you from feeling happy at the same time.


Happiness vs. meaning

Happiness and meaning have an even more distinct line between the two. Rarely are happiness and meaning confused or used interchangeably, and for good reason—they describe two very different experiences.

Humans may resemble many other creatures in their striving for happiness, but the quest for meaning is a key part of what makes us human, and uniquely so.

Roy Baumeister et al. (2013)

Unlike happiness, meaning is not a fleeting state that drifts throughout the day; it’s a more comprehensive sense of purpose and feeling of contributing to something greater than yourself.

As the quote from Baumeister and colleagues (2013) suggests, there are important distinctions between the methods of searching for and the benefits of experiencing happiness and meaning. Scott Barry Kaufman at Scientific American (2016) outlines these distinctions that Baumeister and his fellow researchers found between the two:

  • Finding one’s life easy or difficult was related to happiness, but not meaning;
  • Feeling healthy was related to happiness, but not meaning;
  • Feeling good was related to happiness, not meaning;
  • Scarcity of money reduced happiness more than meaning;
  • People with more meaningful lives agreed that “relationships are more important than achievements;”
  • Helping people in need was linked to meaning but not happiness;
  • Expecting to do a lot of deep thinking was positively related to meaningfulness, but negatively with happiness;
  • Happiness was related more to being a taker rather than a giver, whereas meaning was related more to being a giver than a taker;
  • The more people felt their activities were consistent with the core themes and values of their self, the greater meaning they reported in their activities;
  • Seeing oneself as wise, creative, and even anxious were all linked to meaning but had no relationship (and in some cases, even showed a negative relationship) to happiness (Kaufman, 2016).

Basically, although the two overlaps and each can contribute to the experience of the other, the two can be mutually exclusive (Baumeister et al., 2013).

Relevant reading: 19 Cliché Happiness Quotes & The (Lack Of) Science Behind Them


The origins and etymology of happiness (Incl. root words)

According to Etymology Online (n.d.), the word for “happy” in most languages came from the word for “lucky.” This suggests an interesting trend—perhaps our ancestors believed that happiness was largely a by-product of luck?

It also points to a possible difference of general opinion between earlier generations and our own 20th and 21st-century generations: that happiness was not a vital factor in a good life, but essentially a bonus that some lucky individuals got to experience.

Here’s what author Darrin McMahon writes about the origins and root words of the word “happiness:”

“It is a striking fact that in every Indo-European language, without exception, going all the way back to ancient Greek, the word for happiness is a cognate with the word for luck. Hap is the Old Norse and Old English root of happiness, and it just means luck or chance, as did the Old French heur, giving us bonheur, good fortune or happiness. German gives us the word Gluck, which to this day means both happiness and chance” (McMahon, 2006).


What does self-happiness mean?

Although the term is not used very often, “self-happiness” refers to a sense of happiness or satisfaction with one’s self. It is often associated with self-confidence, self-esteem, and other concepts that marry “the self” with feeling content and happy.

In general, it means that you are pleased with yourself and your choices, and with the person that you are.


The Psychology Behind Human Happiness

Now that we know what happiness is, let’s dive a little deeper. What does psychology have to tell us about happiness?

There are many different theories of happiness, but they generally fall into one of two categories based on how they conceptualize happiness (or well-being):

  1. Hedonic happiness/well-being is happiness conceptualized as experiencing more pleasure and less pain; it is composed of an affective component (high positive affect and low negative affect) and a cognitive component (satisfaction with one’s life);

  2. Eudaimonic happiness/well-being conceptualizes happiness as the result of the pursuit and attainment of life purpose, meaning, challenge, and personal growth; happiness is based on reaching one’s full potential and operating at full functioning (AIPC, 2011).

Some theories see happiness as a by-product of other, more important pursuits in life, while others see happiness as the end-goal for humans. Some theories state that pursuing happiness is pointless (although pursuing other important experiences and feelings may contribute to greater happiness), and some assume that happiness can be purposefully increased or enhanced.

Although they differ on the specifics, these theories generally agree on a few points:

  • It’s good to be happy, and people like being happy;
  • Happiness is neither a totally fleeting, momentary experience nor a stable, long-term trait;
  • At least some portion of our happiness is set by our genetics, but the amount varies from about 10% up to 50%;
  • The pursuit and attainment of pleasure will rarely lead to happiness;
  • There are many sources that contribute to or compose happiness (AIPC, 2011).


What sources create true personal happiness?

Taking together all the various theories and findings on happiness, we know that there are at least a few factors that are very important for overall happiness:

  • Individual income;
  • Labor market status;
  • Physical health;
  • Family;
  • Social relationships;
  • Moral values;
  • Experience of positive emotions (AIPC, 2011).

All of these factors can contribute to a happy life, but research has found that good relationships are a vital ingredient (Waldinger & Schulz, 2010).

When we are happy in our most important relationships (usually our spouse or significant other, our children and/or our parents, other close family members, and our closest friends), we tend to be happier.

We have some control over how our relationships go, so that leads us to an interesting and important question: can we increase our own happiness?


Can individuals learn how to be happy?

The answer from numerous studies is a resounding YES—you CAN learn how to be happier.

The degree to which you can increase your happiness will vary widely by which theory you subscribe to, but there are no credible theories that allow absolutely no room for individual improvement. To improve your overall happiness, the most effective method is to look at the list of sources above and work on enhancing the quality of your experiences in each one of them.

For example, you can work on getting a higher salary (although a higher salary will only work up to about $75,000 USD a year), improve your health, work on developing and maintaining high-quality relationships, and overall, find ways to incorporate more positive feelings into your daily life. This does assume basic access to safety as well as social equality.


8 Examples That Describe What a Happy Life Looks Like

What happiness looks likeGiven our definitions, what does a happy life look like?

Of course, what it looks like will depend on the individual—a happy life for one person may be another’s nightmare!

However, there are a few examples that can display a wide range of lives that can be conducive to happiness:

  1. A woman who lives alone, has excellent relationships with her nieces and nephews, gives to charity, and finds meaning in her work;

  2. A man who is happily married with three healthy children and a relatively low-paying job;

  3. A widow who enjoys regular visits with her children and grandchildren, along with volunteering for local charities;

  4. A cancer patient who has a wonderful support system and finds meaning in helping others make it through chemotherapy;

  5. A social worker who works 70-hour weeks with no overtime pay, to ensure the children on her caseload are in good hands;

  6. An unmarried man in a monastery who has no earthly possessions and no salary to speak of, but finds meaning in communing with his god;

  7. A teenager in a foster home who has several close friends and enjoys playing football on his school’s team;

  8. A man who lives with several pets, enjoys a high salary, and loves his job.

Each of these was pulled from real-world examples of people who are happy. They may not seem like they have it all, but they all have at least one of the ingredients from the list of sources mentioned earlier. We don’t need to have everything we want in order to be happy—true happiness can be obtained by finding joy in what we already have, however much or little that may seem.

What are some visions you associate with happiness? Are there any similarities with these dreams?


Why is Happiness So Important?

You might be wondering why happiness is considered such an important aspect of life, as there are many components of a meaningful life.

In some ways, science would agree with you. It appears that life satisfaction, meaning, and well-being can be linked with happiness, but happiness is not necessarily the overarching goal for everyone in life. It is still important because it has some undeniably positive benefits and co-occurring factors.

June Silny at Happify outlines 14 answers to the question, “What’s so great about happiness, anyway?

  1. Happy people are more successful in multiple life domains, including marriage, friendship, income, work performance, and health.
  2. Happy people get sick less often and experience fewer symptoms when they do get sick.
  3. Happy people have more friends and a better support system.
  4. Happy people donate more to charity (and giving money to charity makes you happy, too).
  5. Happy people are more helpful and more likely to volunteer—which also makes you happier!
  6. Happy people have an easier time navigating through life since optimism eases pain, sadness, and grief.
  7. Happy people have a positive influence on others and encourage them to seek happiness as well, which can act as reinforcement.
  8. Happy people engage in deeper and more meaningful conversations.
  9. Happy people smile more, which is beneficial to your health.
  10. Happy people exercise more often and eat more healthily.
  11. Happy people are happy with what they have rather than being jealous of others.
  12. Happy people are healthier all around and more likely to be healthy in the future.
  13. Happy people live longer than those who are not as happy.
  14. Happy people are more productive and more creative, and this effect extends to all those experiencing positive emotions.


The relationship between mental health and happiness

As you can probably assume from the list above, there is a strong relationship between mental health and happiness! When happy people are healthier, have better relationships, make friends more easily, and find more success in life, it’s easy to see why happiness and mental health are related.

The sources that contribute to happiness are the same as those that provide people with a buffer or protection against mental illness, which explains the close relationship between the two.

A recent study explored the association between happiness and mental health in college students and found that a relatively strong, positive correlation connects the two factors (Shafiq, Nas, Ansar, Nasrulla, Bushra, & Imam, 2015). This correlation held, even when gender and socio-demographic variables were added to the mix.

The close tie between mental health and happiness is reason enough to make happiness an important priority for parents, educators, researchers, and medical professionals alike, along with the simple fact that we all like to feel happy!


6 Videos That Explain Happiness

If you’re interested in learning more about happiness from a scientific perspective, there are a few videos you might want to check out, including:


Positive Psychology: The Science of Happiness by Professor Tal Ben-Shahar from WGBH Forum.


Shawn Achor – The Happiness Advantage: Linking Positive Brains to Performance TEDTalk from TEDx Talks


Positive Psychology – Happier by Professor Tal Ben-Shahar, Ph.D. from FightMediocrity


How to be Happy – The Science of Happiness and Feeling Positive in Life from Memorize Academy


The Surprising Science of Happiness TED Talk by Dan Gilbert from TED


How to Be Happy – The Secret of Authentic Happiness – Martin Seligman from Practical Psychology


A Take-Home Message

I hope this piece was helpful and informative for you, and that you learned something new about the scientific study of happiness. It’s a fascinating area of research, and new findings are coming out all the time. Make sure you stay up to date on the happiness literature, as the findings can be of great use in helping you to live your best life!

What are your thoughts on happiness? Would you define it differently? What do you find is the most important ingredient for your own happiness? Let us know in the comments section below!

Thanks for reading, I hope you are all finding happiness in all your life journeys.

We hope you enjoyed reading this article. Don’t forget to download our three Positive Psychology Exercises for free.

If you wish for more, our Positive Psychology Toolkit© contains over 370 science-based positive psychology exercises, interventions, questionnaires, and assessments for practitioners to use in their therapy, coaching, or workplace.

  • AIPC. (2011). Happiness and positive psychology. Australian Institute of Professional Counsellors Article Library. Retrieved from https://www.aipc.net.au/articles/happiness-and-positive-psychology/
  • Baumeister, R., Vohs, K. D., Aaker, J. L., & Gabinsky, E. N. (2013). Some key differences between a happy life and a meaningful life. The Journal of Positive Psychology, 8, 505-516.
  • Kaufman, S. B. (2016). The differences between happiness and meaning in life. Scientific American. Retrieved from https://blogs.scientificamerican.com/beautiful-minds/the-differences-between-happiness-and-meaning-in-life/
  • Kim-Prieto, C., Diener, E., Tamir, M., Scollon, C. N., & Diener, M. (2005). Integrating the diverse
    definitions of happiness: A time-sequential framework of subjective well-being. Journal of Happiness Studies, 6, 261-300.
  • McMahon, D. (2006). Happiness: A history. New York, NY: Grove Press.
  • Online Etymology Dictionary (n.d.). Happy. Retrieved from http://plato.stanford.edu/entries/behaviorism/
  • Paul, M. (2015). The difference between happiness and pleasure. Huffington Post: Life. Retrieved from https://www.huffpost.com/entry/the-difference-between-happiness-and-pleasure_b_7053946
  • Shafiq, S., Naz, R. A., Ansar, M., Nasrulla, T., Bushra, M., & Imam, S. (2015). Happiness as related to mental health among university students. International Journal of Humanities and Social Science, 5, 124-132.
  • Silny, J. (n.d.). What’s so great about happiness, anyway? (The answer: plenty!). Happify Daily. Retrieved from https://www.happify.com/hd/whats-so-great-about-happiness/
  • Waldinger, R. J., & Schulz, M. S. (2010). What’s love got to do with it?: Social functioning, perceived health, and daily happiness in married octogenarians. Psychology and Aging, 25, 422-431.

About the Author

Courtney Ackerman, MA, is a graduate of the positive organizational psychology and evaluation program at Claremont Graduate University. She is currently working as a researcher for the State of California and her professional interests include survey research, wellbeing in the workplace, and compassion.


  1. Leonardo

    Thanks for this article.
    Nowadays, i do gratitude exercice in the morning, midday and before sleep. It’s help me stay more in positive thoughts. I like soo much.

    I write: I am grateful for … ( 10x )

  2. Marc

    Thank you so much for this very insightful article. It really taught me a lot.

  3. PB

    Thank you very much for the article. I think it will help me a lot. It has given me clear ideas of how I can try and attain some degree of happiness, and hence greater contentment. Happiness is important in individuals – I believe it is a key to tolerance and a stable society.

  4. Zkh

    Thank you very much for your useful content, it helped my lecture a lot

  5. Anon

    Happiness is nothing more than some sick joke to the multitude of us who have never been accepted, been ignored & hade their very humanity kicked out of them throughout the decades until a hollow shell remains. What we once hoped for no longer exists but are expected to act happy to appease society. To make the rest of society feel better about themselves. We may come across as pleasant and congenial in situations but internally we are all scream. Enjoy your illusion of happiness.

    • Paulo

      Who hurt you

    • Kay

      Have you ever considered that you’re the one who has an illusion of happiness. You will only receive the same energy you put out into the world. Happiness is found within oneself. You change the way you think and feel about yourself and the things around you to a more positive outlook, you will receive a more positive in return. I think you should start by not trying to make the rest of society feel better about themselves and focusing about trying to make yourself feel better about yourself. Everyone is beautiful, everyone is loved, and everyone deserves happiness, Including you.


    Given that happiness is opposite of sadness, one tend to define happiness as mere absence of sadness and or sorrow, would it serve the purpose of understanding entire gamut of happiness state.
    MONKS and seers claim they are beyond happiness and sadness. They remain composed. Is that state can be called happy state.
    A cart puller half- clad sleeping on the culvert while sun is blazing up seems to be happy. Does it cover any kind of happy definition discussed here.
    Immediate Happiness among the poor or impoverished seemed to be the moment their just needs like meal shelter dress are satisfied. Do the tamed animals or domestic pets are happy always?

  7. Matt Smart

    Happiness for me is about balance in life and actually just enjoy yourself for who you are and not listening to what others think because for me at the end of the day, the only person who lives your life is you so be balanced and enjoy things and don’t listen to too much criticism! Favourite song Sunscreen by Bahz Luhrman 1999

    • Nicole Celestine, Community Manager

      Hi Matt,
      Thanks for reading. Those sound like some great principles to live by. It’s important to live for the things we enjoy and be mindful of the criticism we take on board (because we’re never going to please everyone, right?)
      – Nicole | Community Manager

  8. Art Marr

    Happiness, Meaning, and Affective Neuroscience: and why happiness is necessary for a productive life
    Happiness is an elusive property, but it can be argued that it should meet certain neurological criteria. This is the argument of the affective neuroscientists Kent Berridge and Morton Kringelbach. Per this model (linked below), happiness is a function of the combined affective states of arousal and pleasure mediated respectively by the activation of mid brain dopamine and opioid systems. However, this analysis neglects the fact that these systems when jointly activated co-stimulate each other and provide an enhanced affective experience that is subjectively reported as a ‘peak’ or ‘flow’ experience. This observation can also be easily replicated through simple procedure, as demonstrated below.
    Simple Procedure
    Just attain and sustain a state of rest (mindfulness practice is the best way to achieve this) and simultaneously and consistently engage exclusively in meaningful or important behavior and you will feel relaxed, pleasurably aroused, and ‘intrinsically’ motivated. The more meaningful the behavior, the greater the affective response. That’s it.
    Simple Explanation
    Individuals who engage in tasks that have a consistent and high degree of ‘meaning’ (e.g. sporting events, creative activity) naturally experience a state of high alertness and arousal (but not pleasure) that maps neurologically to the activation of mid-brain dopamine systems. However, many of these individuals also report a concurrent feeling of pleasure or bliss, but these reports are evidenced only in non-stressed situations when the covert musculature is inactive or relaxed. Since relaxation engages opioid systems in the brain, and because opioid (pleasure) and dopamine (arousal) systems stimulate each other, blissful states require the simultaneous engagement of resting protocols and meaningful cognitive states, behaviors that can be very easily achieved and sustained.
    I offer a more detailed theoretical explanation in pp. 47-52, and pp 82-86 of my open source book on the neuroscience of resting states, ‘The Book of Rest’, linked below.
    The Psychology of Rest
    Meditation and Rest
    from the International Journal of Stress Management, by this author
    Berridge-Kringelbach on the Neuroscience of Happiness https://sites.lsa.umich.edu/berridge-lab/wp-content/uploads/sites/743/2019/10/Berridge-Kringelbach-2011-Building-neuroscience-of-pleasure-well-being-Psychol-of-Well-Being.pdf

  9. Mike

    Thank you, it was an excellent essay!

  10. Raymond Barske

    The pressures of contemporary society are enormous and as a result the average person is more in a survival or existance mode (providing food, clothing, shelter, etc) than a living mode (happiness, personal meaning, etc). Your article puts the concepts of happiness, meaning, etc into perspective which in my opinion enables a person to stand back and refocus on what is actually important in life – to that particular person. Thank you for an informative, enlightening and helpful article.

  11. Elisa

    “Happiness is a state of the soul; a state in which our natures are full of the wine of an ancient youth, in which banquets last for ever, and roads lead everywhere, where all things are under the exuberant leadership of faith, hope, and charity.”
    ― G.K. Chesterton, Charles Dickens: A Critical Study

  12. MichaelBarber

    Retired lawyer in the UK whose life is permanently bogged down by anxiety. I found your article in the hope of Googling my way out of my current depressed state. Thank you. A lot of what you say is common sense but it helps to have it explained so precisely and logically. I have saved the piece in my Favourites and plan to use it and refer to it as my Self Help Guide
    Michael Barber


    Thanks.this article gonna very helpful for me.as a student it is a very knowledgeable article. Bundle of thanks dear.

  14. Ruth

    Thank you so much for this great article, for me happiness is to have inner peace.

  15. Aaysha

    Thank you I’m so Happy After Reading This Post

  16. Mousumi Dahal

    Very impressive article. I follow your rule and waiting for your new post. Tricarementalhealth.co is also give same types of knowledge.

  17. Tiny

    Thank you for reminding me what happiness is. I forgot how it felt like.

  18. Sushant

    Best post I have ever gone through on happiness.

  19. Jocelyn Flores

    Wow thank you that helps a lot

  20. Chris

    Thank you for reminding me of how meaningful relationships are.

  21. Rajiv Subramanian

    Hi Courtney,
    Great article, and excellent summary on this very complex topic! I am myself starting some research on this topic and would love to be in touch with you.

  22. limo kiptoo erick,(kenyan)

    feeling better mentally ,and in what you do gives a kinda of pleasure and joy…..this is happiness according to me

  23. Guru

    By doing thing or getting thing makes us happy is fleeting .if you don’t do or don’t possess that can cause unhappiness.In spirituality you are happy for no reason ,there is oneness or connectivity or there is no other.


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