The "teacher" here originally refers to the feng shui master, which means that you can't say to the feng shui master, "Next time you come to our place, please help me have a look!" In this case, it seems that you are insincere, disrespectful and don't take people seriously. It's no use talking, even if people come, they won't show it to you. Just wait.
The extension of this sentence is a rule of "learning from others". As a teacher, don't easily agree to people's casual demands. Sometimes people may just be polite to you, and it will be embarrassing if you take the initiative to send it to your door without sincere invitation.
The Book of Changes said, "The robbers asked the children for help, and the children also asked me for help." Teachers teach students, but they can't take the initiative to ask students, so students won't respect you and attach importance to you, and naturally they won't learn anything. They can only wait for him to take the initiative to ask the teacher, and with such a sincere heart, they can really learn something.
The law is not shallow, the way is not cheap, and the doctor does not knock at the door:
1, the law is not light.
In a narrow sense, "Fa" here refers to the legendary magic, such as the seventy-two changes of the Monkey King and the thirty-six changes of Zhu Bajie, but magic does not exist at all. "Fa" in a broad sense refers to extraordinary skills, such as the superb skills of sculptors, carpenters and martial arts masters. Generally speaking, the ancients will pass on their unique skills to future generations. People with large patterns will accept some apprentices and then pass them on to apprentices with higher talents.
2. The road is not cheap.
The "Tao" here can be understood as truth, method and experience. A person summarizes useful methods and skills through learning and life experience, and can't easily tell others, even if the other person wants to learn, he has to pay the corresponding price. As the saying goes, there is no shortcut to success, but there must be a way. If you master this method, you can avoid many detours and succeed more easily, otherwise you will get twice the result with half the effort.
3. The doctor won't knock.
Under normal circumstances, if someone in the family is sick, relatives will invite the doctor to the home, instead of the doctor taking the initiative. There are two reasons behind this. The first reason is that if the doctor just listens to someone who is ill and is good to the doctor, he will take the initiative to run to the patient's home and find that the other person is alive and kicking and not sick at all, which will easily lead to misunderstanding, which will be very embarrassing.