| Prologue | To you who want to build up your life capital and become an adult on your own

Chapter 1.
Adults don't waste their emotions

01.
Things that are momentarily satisfying but ultimately detrimental to me
02.
Don't habitually mention death.
03.
People who last a long time in any field are different.
04.
A space filled with discontent cannot be tied down with the belt of order.
05.
If you live life too tightly, you're the only one who suffers.
06.
If you feel like you're only taking care of yourself and only losing out,
07.
If you have lost a loved one
08.
The power of the mind to accomplish anything without wavering
09.
People who are angry die quickly.
10.
Say goodbye forever to those who do not welcome me.
11.
Harmless words that can be repeated over and over again to create a day you want to live.

Chapter 2.
Adult life has a different quality

12.
Don't grow old until you're wise.
13.
3 Routines of People Who Succeed in a Recession
14.
Why I Don't Need to Take Revenge with My Own Hands
15.
How to Make the Most of Your Alone Time
16.
Three things people who lose their dignity after 40 have in common
17.
If you want to have a generous adult attitude
18.
What I boast about proves my intellectual level.
19.
Why You Need to Break Your Leg-Wobbling Habit Quickly
20.
7 Minimum Manners to Fill an Adult's Dignity
21.
Why do I get angry and rage more often than others?
22.
If it gets too serious, it'll only harm my life.

Chapter 3.
Adults should have no regrets about their choices.

23.
The teacher appears when I am ready to learn.
24.
Those who need to be sent must be sent quickly.
25.
From now on, life will improve if you use social media like this.
26.
17 Tips to Boost Your Intelligence and Quality of Life
27.
The attitude of people who shine more and more as they get older
28.
Always judge for yourself in all situations and in all things.
29.
You can lose your wallet as many times as you want, but just keep this in mind.
30.
Don't insult the knowledge and valuable experience you've worked so hard to gain.
31.
Anxiety cannot replace the time spent on effort.
32.
How to recognize a person who lives with a star in their heart

Chapter 4.
Adults always think that they can be wrong too.

33.
Warm words like a blanket: “There must be a reason for everything.”
34.
Before you turn 40, you must do this for 30 minutes every day.
35.
I can be a bad person to some people too
36.
If you look at it nicely, there is nothing that is not pretty.
37.
5 Habits That Will Transform Your Life After 30
38.
This isn't the first time the best intentions have led to the worst.
39.
I'm okay with not shining forever
40.
What I love most is not to doubt
41.
Start a daily routine of self-criticism.
42.
A friend's flaws are not something to be understood, but rather something to be endured.
43.
If you can start by yourself, you can do anything.

Chapter 5.
As adults, we must determine our own values.

44.
Why don't you live your life risking it?
45.
Reading and copying a book after age 50 will make your life clearer.
46.
I know why my growth is slow
47.
The saddest comfort in the world is comparing yourself to someone worse off than you.
48.
How to give myself a value more precious than the fame the world gives me
49.
Bowing my head to the ten thousand won bread
50.
A good rejection requires stamina.
51.
Excessive faith is actually evidence of incompetence.
52.
No need to break the awkward silence when the conversation breaks down
53.
I respect people who do their own work the most.

Chapter 6.
An adult is someone who chooses and uses words.

54.
Desperate days for higher levels of thought and creation
55.
You can tell the level of the wine just by looking at the wine recommendation comments.
56.
Adults' words are quiet and calm.
57.
A person who finds meeting up annoying, but once they meet up, they have fun
58.
As you get older, be more selective about your comments on social media.
59.
Why Fighting Couples Have a Negative Impact on Their Children's Lives
60.
Why You Should Write After 50
61.
Why People with a Sense of Mission Live More Powerful Lives
62.
If you have more than 3 years of writing experience, live like this.
63.
Why do I always imagine negative things?

Chapter 7.
Adults also wander, but they do not waver.

64.
Why it's important to have eyes that see the truth
65.
The most powerful intellectual device that protects my mind
66.
Don't say carelessly, "This too shall pass."
67.
7 Things to Prepare for a Dignified Aging
68.
Why Life Doesn't Get Better the More You Try
69.
How to make your one life more valuable
70.
If I really want to change my life, which doesn't change much,
71.
Don't ignore your body's signals to rest.
72.
How to Live Clearly as the Best Adult
73.
I am the master of the stage called my life.
74.
Don't forget that today is another day you can love someone.

| Epilogue | You're doing well enough just by not running away.
| Appendix | A Handwritten Note to Open the Door to Intelligence

The sixth book in the 'Kim Jong-won's World Philosophy Collection' series,
The Wisdom of William Shakespeare, a Great Star in Literary History

Kim Jong-won, a bestselling author chosen by 1.2 million readers,
Finding the Path to Adulthood Through William Shakespeare's Words

The "Kim Jong-won's World Philosophy Collection" series, which brings philosophy from distant knowledge to practice close to life, is a grand project that connects 30 intellectuals and 30 keywords, and "Don't Show Everything You Have, Don't Say Everything You Know" is the sixth book in the series.
The sixth intellectual the author has highlighted is William Shakespeare, the most brilliant playwright and poet in the history of human literature.
In "Don't Show Everything You Have, Don't Tell Everything You Know," the author refined the wisdom of life gleaned from Shakespeare's words and created a guidepost pointing to the "path to becoming a true adult" for those who are still wandering on the difficult journey of life.

Shakespeare's works were beloved by the public even during his lifetime, but they are still widely read and considered classics hundreds of years later.
Shakespeare's works imbued us with profound insight into the human psyche, and through them he was able to become a man who lived not just in one era, but in all eras.
His writings are still loved by countless people today, proving that he is a writer for all times.
The keyword the author uses to read Shakespeare is 'adult'.
The author says, “An adult is someone who consistently demonstrates his or her worth in the most dignified way,” and through Shakespeare’s writings and life, we can glimpse the path to becoming a true adult.
The author conveys to readers the questions and answers that must be asked to become such an 'adult' through insight extracted from Shakespeare's sentences.
How do adults manage their emotions? How do they cultivate character? What are the criteria for making valuable choices? How do listening and speaking reveal a person's character? How do we cultivate our own self-worth? If you want to live a life where you live each day with dignity, not simply growing old, but becoming an adult yourself, this book will help you discover and internalize the timeless wisdom of Shakespeare.

This book goes beyond simply reflecting on the problems we may encounter in our daily lives, along with the messages Shakespeare sends, and offering insights into how to live a solid adult life.
By presenting pen-and-paper passages that allow you to deeply reflect on the realization and practical advice that can be applied immediately in your daily life, it helps Shakespeare's precious truths to be absorbed into your life more quickly.
This book will teach readers who are wondering how to live a good life and a life without regrets how to become adults who can live a shining life.