21 Lessons for the 21st Century(Harari, Yuval Noah)

 1. The current war is not a physical war, but a data (information) war.


You cannot conquer knowledge through war.

mobile e-book: 430p


Now, you cannot gain much money by physically suppressing any country.

What makes money now is data, design, function, and the image of the company.

Would it be possible to maintain or create companies like LG or Samsung by occupying Korea by force?

What makes money is people's thoughts and knowledge.

Knowledge cannot be forced out, and it is more economically beneficial to bring in one person who can design semiconductors than to make missiles and attack other countries.

Nowadays, knowledge is much more valuable than swords and guns, and a country that has a lot of information and knowledge and uses it well becomes stronger and wealthier.

That is why we should study harder and accumulate and use knowledge well for the prosperity of our country.


2. Let's constantly study and reflect deeply to get to know ourselves.


In order to live in the future without falling behind in the world - not only economically but also socially - the ability to constantly learn and continuously renew oneself will be necessary.

mobile e-book: 639p


In today's era, there is so much information and so much to learn.

Humans will continue to develop, new functions and information will overflow, and the ones who will accept it will be the people of that era.

Even now, countless media and articles are being created every moment, and in the meantime, people often learn more or acquire it quickly through videos or summaries.

It is good to learn a lot, but what criteria should we use to accept this information?

I think that the ability to discern only good information among a lot of information is a reflection on oneself.

Why am I watching this video (article)?

What help will it be to me after watching it?

If you think about these things, won't you be able to learn a little about yourself and know what information to accept?


3. People should leave behind writing.


The true mystery of life is not what happens after I die, but what happens before I die. If you want to understand death, you must understand life. 

mobile e-book : 758p


The dead do not speak.

However, the only way to know what a person did and what he thought was to read his writings.

That is why people must leave behind writings.

The words of Socrates (thanks to his disciple Plato) can still be seen 2,000 years later.

If Socrates had not left his words in writing, we would never have known his thoughts and words.

I think it is truly a blessing to be able to meet the thoughts of many great masters, not just Socrates, in books.

Life can be short or long in some ways.

I think it depends on what you think, and I think you should always think about and practice what the purpose of your life is.

What should I do to live?

What is my true desire?

The purpose and direction of my life now is to read books, write, and continue to study about myself.

And my family and children who read my writing may have their own thoughts and write their own writings.

I think that is how the person's thoughts are maintained and continue to follow. I think that the reason humans live is to continue their thoughts.

I think that each person has a role and purpose.

I think that the person who finds it early and acts on it is living the wisest life.

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