1, the song is complete, the waste is straight, the depression is full, and we are new.

This sentence expresses a dialectical point of view, pointing out that things have the nature and relationship of opposites and complementarities. Curved things can be kept, and curved things can be straightened; Low-lying places can be filled with water, but old things can rejuvenate. This sentence reminds us not to easily deny things that seem imperfect or outdated. They may have another perfection and value.

2, knowing enough is not humiliating, knowing it is not dangerous.

This sentence emphasizes the importance of contentment and Zhi Zhi. People who are content will not be humiliated because of greed, and people in Zhi Zhi will not be in danger because of blind pursuit. Contentment and Zhi Zhi are a kind of wisdom and a necessary condition for maintaining inner peace and happiness.

3. Sages do not aim at nourishing the stomach.

This sentence points out a simple and simple attitude towards life. Saints pay attention to internal enrichment and satisfaction, not external display and vanity. This attitude towards life can make people stay calm and firm and not be disturbed by the temptation of the outside world.

4, five-color blindness; Five tones are not deaf; Five flavors are refreshing.

This sentence warns people not to indulge in sensory enjoyment. Too complicated colors make people lose their ability to distinguish, too noisy music makes people lose their sensitivity, and too rich taste makes people lose their ability to taste. This sentence reminds us to enjoy the pleasure of the senses moderately, and not to indulge in it and lose self-control.

The important content of Laozi's thought:

1, Taoism is natural: this is one of the cores of Laozi's thought. Taoism means that the laws of nature are natural, and people should adapt to nature, not forcibly change it, but learn to adapt to and follow the laws of nature. This thought expresses Laozi's profound understanding of nature, and also reminds people to keep a peaceful mind and not to interfere with and destroy the natural environment excessively.

2. Governing by doing nothing: This is another important concept in Laozi's thought. Governing by doing nothing means that the government should interfere with society and people's lives as little as possible, so that society can develop naturally and people can live naturally. This thought embodies Laozi's view of government governance. He believes that the government should put the interests of the people first, not its own power.

3. Combining rigidity with softness: This is another feature of Laozi's thought. Flexibility means that people should learn to use wisdom and strategy when dealing with things, and not be too rigid and tough. This kind of thinking reminds people to pay attention to strategy and wisdom when dealing with problems, and not to be too impulsive and direct.