The literal meaning of this sentence is. If the front door is not lit, the backyard will be dark. But in fact, this sentence has a deeper meaning, and it also contains the teachings of ancestors to future generations. Lights are not only used for lighting, but also can be interpreted as lights that illuminate the road for people walking forward. For example, street lamps are just for lighting people; For example, lighthouses provide directions for people sailing on the sea. So in the history of our country, people who can guide others are often compared to lights.

This sentence is the teaching of ancestors to future generations. The behavior of the previous generation will have an impact on future generations. They hope to tell future generations through this common phenomenon that family style has a great influence on future generations. They used two common things, the front door and the backyard, and the common action of lighting a lamp to record their profound teaching to future generations.

With what? Fish start to stink on their heads? Is it the father's fault that his son doesn't teach? Have a similar meaning. Because parents are children's first teachers, family education plays a very important role in children's life education. Therefore, only by combining good family education with school education can children grow into a responsible youth. If the previous generation does not have good moral character, the next generation will also be affected, so the previous generation needs good moral character to have a good influence on the next generation.

Lights also represent hope. Lights represent light, hope and guidance. The first lamp in life is parents. We learn from their advantages, but their shortcomings also affect us, so parents need to set an example and guide us on the right path. Because if parents are not strict with themselves, they will naturally not pay so much attention to the teaching of their offspring, so that they can't take themselves as an example for their children to learn, so that they can't form a good family style, so that their children can't continue the glory of their ancestors. So the ancestors left this sentence in order to let people understand the importance of family education.