[Preface to the 10th Anniversary of Publication] I ask that you continue to work hard in your respective positions.
[Prologue] How do you want to age?

Chapter 1 I want to live a fun life until I die

What's so unfair?
Things I've learned from overcoming several near-death experiences
Why do you say you're lonely but do nothing?
[To you who always says, “When you get old, you have to die”]
The secret to our family of three generations and thirteen living under one roof
I taught my daughter-in-law how to say no.
[To parents who are upset and say, ‘This child wasn’t like that when he was little…’]
Be proud and suffer
Why studying after I turned seventy was the most fun
Living recklessly is the safest way.
[To you who says, “I should spend my old age traveling and doing things I’ve never done before.”]
What Sir Hillary taught me after meeting her after 30 years
Why I Hate the Phrase 'Do Your Best'
There still lives in my heart a boy who has not matured yet.
[To those who lament that they have never lived freely in their lives]

Chapter 2 Don't grow old like this

For those who are afraid of growing old
[To you who is always anxious about falling behind others]
First, let go of the idea that you become weaker as you age.
Never interfere in your child's life.
[To parents who feel wronged, saying, “You don’t know how I raised my child?”]
Things to consider before saving money blindly
[For those who are anxious because they haven't saved any retirement funds]
Don't try to teach the young
[To you who is busy bragging, saying, “In the old days, I…”]
Don't live today with yesterday's feelings
How I Deal with Aging
When I laugh, my wife laughs too, and when my wife laughs, I laugh too.
[For those of you who are worried that your spouse will die first]
Why do old people have big ears?
Stop being so kind to yourself.
[To you who keeps regretting, 'Why did I do that back then?']

Chapter 3: Things I Wish I Knew When I Was Forty

The saying, "Nothing goes my way" is wrong.
[For those who misunderstand the meaning of the word 'positive']
The best inheritance a parent can leave to their child
When you know who you are, you don't have to compete with others.
Why I Don't Regret My Life
As we age, we must learn to manage minor anger better.
[If you reject me, I will be angry at you]
Don't neglect the practice of resting well.
Picture your life in old age before it's too late.
[To those who say they've been feeling depressed lately]
What I want to say to those who still haven't reconciled with their parents
What I Want to Say to People Who Have to Quit Their Jobs
[To you who is worried that no one will come to you after retirement]
Three Advice to Newlyweds
[To those who blame their spouses, saying, 'I'm a fool for living this long.']

Chapter 4 What do people live by?

An embarrassing confession after 50 years of marriage
Family precepts: What is absolutely necessary for being happy together and apart?
[For you who are tired of your family fighting over the same issue every day]
The people I meet are my life.
[To those who have made many mistakes and regretted it]
Things I've Learned While Raising My Grandchildren
Why I Recommend People to Have a 60th Birthday Party
Enjoy the pleasure of generation gaps to your heart's content.
Make a resolution to write a diary every day for a year.
[For those of you who are at a loss as to how to plan your life]
Why I Deliberately Tell My Kids Jokes About Dementia
What will you leave behind for your loved ones?
How to make my life a little more meaningful
[To the 'smart person' who thinks he is not good enough]

Chapter 5 To you who stands at a new starting point in life

The golden age of life is right now.
[For those who find the ever-increasing number of birthday candles terrifying]
If you want to start something again
Don't be proud of knowing life.
[To those who say life is boring and dull]
Don't put off your hobbies any longer using being busy as an excuse.
The person I want to do the best with for the rest of my life is my wife.
[To you who says patience is the best remedy for marital quarrels]
Writing a will in advance can change your life.
[For those who can't make a quick decision at a crossroads]
Why I Didn't Buy a Car or a Cell Phone
What I've Learned from 25 Years of Medical Service
The moment you realize you're useless, you become useful.
[To you who is greedy for a hat as you get older]
Lessons learned from the death of Park Wan-seo
[To those who feel it is too precious to throw anything away]
Why You Should Make Today Valuable

[While compiling the book] On 'How to Play Life to the End'
[10th Anniversary Special Conversation] Today, we are all living in the golden age of our lives.

“I want to live a fun life until I die.”
The principles of life that the cheerful old scholar Lee Geun-hu has maintained for 90 years.

Professor Emeritus Lee Geun-hoo of Ewha Womans University, who has been caring for patients and teaching students for 50 years as a psychiatrist, became a topic of conversation in 2011 when he became the oldest person and top student to graduate from the Department of Cultural Studies at Korea Cyber ​​University at the age of 76.
But what's even more surprising is that he completely lost the sight in his left eye 20 years ago and lives with seven diseases: diabetes, high blood pressure, gout, herniated disc, coronary artery stenosis, and gallstones. In short, he is a walking general hospital.
It must have been quite difficult, but when asked why he started studying again, he said he just found it fun.
He even said that studying at a cyber university, which he started when he was over 70, was the most fun he had ever studied in his life.

He first visited Nepal as a member of an academic group in 1982, when overseas travel was not free.
Since then, we have been providing medical services in Nepal for over 40 years.
Also, while I was a military doctor, I started taking care of the children at Gwangmyeong Daycare Center, and I have continued to do so for over 50 years.
When asked why he has served for more than half his life, he said it was simply for fun.
He is still active even though he is approaching eighty.
As the director of the Family Academy, a non-profit organization, he provides youth sexual counseling, parent education, and life preparation education for the elderly. He also visits Nepal every year to provide medical volunteer work, attends poetry readings and film club seminars, and writes commissioned manuscripts.
That's why each day that I face as I get older is enjoyable and fun.

When I asked him about the secret to living his life, he humbly recalled that he didn't have any special secrets, but that he lived his life trying to make everything fun.
That doesn't mean I only picked fun things.
I just made the things I had to do more fun.
During his days as a psychiatrist, he spent all day in a small clinic of about three or four pyeong, listening to the painful and sad stories of patients confined to their own worlds. His body and mind became heavy and dark, as if a large iron ball was hanging from them.
Could these patients ever be completely cured? He changed his mind.
Let's do something that will help patients get better, even just a little.
Then there were many things I could do.
He was the first in Korea to convert a closed psychiatric ward into an open ward, introduced psychodrama, which allowed patients to pour out their inner thoughts, with the help of Daehangno theater actors, and established the Korean Psychotherapy Association, making great contributions to the development of psychiatry in Korea.

The real fun in life depends on your own will and actions!

Everyone wants to live a happy and enjoyable life.
And I think that living a fun life means choosing to do what you want to do and what you enjoy doing.
That's why many people regret getting older, saying, 'I wasn't able to do what I wanted to do' or 'I wasn't able to live the way I wanted to live.'
But it is natural that one cannot live life as one wishes.
No one is born willingly, and we cannot help but influence each other through our network of relationships with others.
However, life changes depending on how much will I have in making decisions and acting in a given situation.

Russell said.
“The wider the world of fun, the greater the opportunities for happiness and the less we are at the mercy of fate.”
As we live, we are placed in various situations, whether we want them or not.
But even though we can't choose our circumstances, we can choose how we act.
And those choices accumulate to form your life.
Therefore, the person who truly enjoys life is not the one who chooses fun things, but the one who believes that no matter how difficult the situation is, he will have fun.
Those moments accumulate and create a truly interesting life.
If you just know this one thing, your life can be much richer.

“Teacher, will I be okay like this?”
Advice for younger people who say they're afraid of getting older

People ask the old scholar who has spent his entire life looking into people's hearts.
“What’s good about getting older?” His answer is bland.
“What’s good about getting older? There’s nothing good about getting older.
But because aging comes to everyone, it is also a part of life that must be accepted.
“Rather than saying that getting older is good, it’s much more important to have the mindset to create good and enjoyable things as you get older.”

These days, whenever the topic of old age comes up, everyone talks about 'money' first.
Due to the longer lifespan, there is an atmosphere that old age without money is suffering and despair.
So, with pensions and insurance, we start preparing for old age from our 20s.
Moreover, the fear of physical changes that come with age is so great that even in the 50s or 60s, people complain, “I feel pain everywhere” and “My memory has deteriorated significantly.”
I also worry that when I get older, I will be lonely and bored every day without anyone visiting me.
And yet, they keep bragging about things that aren't really bragging, saying, "In the old days, I did this," and try to teach young people this and that.
He gets angry like crazy over trivial things like subway seat problems or his family's attitude.
On the other hand, some older people flaunt their "experience" by saying that they are no different from young people even though they are old, but this is also based on the same negative perception of aging.

Everyone wants to become an old person who is physically old but mentally mature.
An elderly person who honestly observes the course of life, accepts natural changes as they are, and whose accumulated wisdom shines through in daily life, while maintaining self-centeredness and also possessing the appearance of a gentle mediator.
However, among those we meet in reality, mature elderly people are rare.
Because everyone focuses on getting worse as they age and spends all their energy mourning what they have lost.

“At any moment, I will believe in myself until the end!”

As we age, some things get better and some get worse.
Aging of the body, economic decline, and decline in social activity are all worsening issues.
On the other hand, there are things that get better.
There are so many new emotions that I have never experienced before and never knew about before.
If you follow the trajectory of life from birth to death, where is there an age that isn't fun?
Of course, the joy of being twenty and the joy of life felt when you turn forty or fifty are completely different.
But because it is different, it is more special and valuable.
If we don't know that and compare our current state to other times, we will live a life of regret and resentment.

What we need is the ability to find joy in our present state.
For those who think that getting older means getting old, sick, and weak, that's all there is to getting older, but if you try to discover the things that get better with age, you can live the rest of your life well.
Professor Emeritus Lee Geun-hoo also lives each day to the fullest thanks to the fun he discovered as he grew older.
I go to the lab almost every day, listen to online lectures, and receive psychological counseling.
Welcoming those who come to us for advice, and not hesitating to make the first contact with someone you miss.
I write and drink tea with my wife.
When I was young, I always lived looking forward, so I enjoyed the leisurely pleasures that I never knew existed.
He speaks to his juniors in life.
“Don’t feel resentful that you are getting older year by year.
No matter what anyone says, we lived, worked, and enjoyed ourselves as much as we could.
It's more urgent to find joy in what I can do at my age.
“Because the time we have left in life is shrinking even at this very moment.”

“How do you want to age?”
The Wisdom of Aging, written with Kim Seon-kyung, author of the best-selling book "Things I Didn't Know at Thirty"

But this kind of pleasure can never be found unless you want it.
Also, not everyone has to live like 'Lee Geun-hoo'.
He says this:
“For those who fear growing old, I would say that old age is a time of discovery.
If he asks me what I want him to discover, I say, 'You have to discover it on your own.
I can only answer, ‘Otherwise, it wouldn’t be a discovery.’”

So, from now on, we need to study aging.
The appearance of one's old age tends to be naturally determined by how one has lived and one's attitude toward life in the past.
From young people to middle-aged people, we must seriously reflect on how we will age and realize that growing old is not something to be afraid of.
Then you can live more faithfully in the present.
We spend our entire lives preparing for exams, jobs, marriage, and many other things, but we often neglect preparing for aging.
Growing older also requires ‘prior learning.’
No matter how much you prepare, you're bound to panic and make mistakes when it actually happens, and if you start when you're older, it's too late.

This book contains 53 pieces of wisdom about aging that would be good for people who are afraid of getting old and regret their past lives but still want to live the rest of their lives better, such as, “What’s so unfair?”, “Why do people say they’re lonely and do nothing?”, “Living recklessly is the safest path?”, “Be brave and suffer?”, “Why I hate the phrase ‘do your best’?”, “To those who lament that they’ve never lived freely in their lives, never interfere in their children’s lives”, and “Why you should spend today preciously”.