The iron law of human nature that I understand after I turned 50:
1. Never appear as a weak person.
2. Just like the leader's circle of friends, no need to comment.
3. The most stable relationship is not to give gifts, but to follow the "Mehrabin Rule".
4. When repairing a car, call "boss" instead of "master".
5. The so-called connections are mostly illusory. Without experiencing poverty, it is difficult to understand the fickleness of the world and it is difficult to find true friends.
6. Showing off will not bring happiness.
7. People can often accept the success of strangers, but find it difficult to tolerate the continuous promotion of those around them.
8. No matter how kind you are, when you lose your value, even if you are as gentle as a cat, you will be despised.
9. What often wears you out is not the work, but the interpersonal relationships at work.
10. There is no need to look back at those who leave.
11. If you want to make money, target the female market, because men make money and women consume.
12. No matter how deep the relationship is, it needs money to maintain it. Without money, the relationship will fade easily.
13. There are different ways to test each other between men and women, and the results are often accurate.
14. You don’t have to compete for everything. Only when you know when to play dumb can you be a wise man.
15. When you are in financial difficulties, you can see the people around you clearly. There will always be people who are so realistic that you will be disappointed.