Before his death, the world's richest man told his son the "unwritten rules of the world":

​​​​1. The first: Do not trust anyone; trust human nature. Those who hope you become better are your parents; those who fear you becoming too good are your relatives; those who wish you ill are your colleagues.

​​2. The second: No one will respect you because you respect them; they will only respect you because they need you.

​​3. The third: Do not hold any spiritual purism towards anyone; every soul in this world is half human and half ghost, and getting too close makes it impossible to see anyone clearly.

​​4. The fourth: When interests align, strangers become friends; when interests disappear, friends become strangers.

​​5. The fifth: The more experiences one has, the more indifferent they become; it’s not that they have lost the ability to interact with others, but rather that they have lost interest in playing along with others.

​​6. The sixth: Do not take yourself too seriously, but do not underestimate your worth either. Overestimating yourself will make you disregard others, while underestimating yourself will cause you to miss opportunities.

​​7. The seventh: Before you achieve anything, do not emphasize your self-esteem too much, because no one will care.

​​8. The eighth: Do not try to change anyone, nor expect anyone to change because of you.