Li Xiaolai said in "The Road to Wealth and Freedom" that if a concept exists objectively but does not exist in the subjective cultural concept, then people have no perception of that objective existence. On the other hand, if a concept exists, even if it is not an objective existence, people can still perceive it subjectively.
Paraphrasing: In other words, man lives in a world of ideas.
If you don't have the concept of gravitational acceleration in your head, you will believe that the heavy iron ball will hit the ground first, even if it is an objective phenomenon.
Long ago, people believed that there was "phlogiston" in the air, which was a subjective concept, and people would believe in its existence even if it did not exist objectively.
So everyone's belief is very important, we don't live in a cold objective world, what you believe is very important.
The objectively existing world, you can't change it no matter what, it will only operate according to the established rules.
And your own world can be changed. As soon as you change your attitude towards it, your world will change immediately.
I choose to believe that writing can change my life, and I choose to believe that calligraphy can bring me unexpected gains.