Contentment is an idiom in China. Pinyin is zh zh zhī zú cháng lè, which means that you are always happy when you know that you are satisfied. Describe being satisfied with your achievements and feeling happy.

From the forty-sixth chapter of Lao Zi by Li Er in the pre-Qin period: "There is a way in the world, but it is hasty; There is no way in the world, and the suburbs have horses. Sin is greater than desire, disaster is greater than dissatisfaction, and blame is greater than desire. So contentment is enough, and it is enough. "

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Tao Te Ching is a philosophical work of Lao Zi (Li Er) in the Spring and Autumn Period, also known as Tao Te Ching, Lao Zi's Five Thousand Words and Lao Zi's Five Thousand Articles. It is a work before the separation of pre-Qin philosophers in ancient China and an important source of Taoist philosophical thoughts.

Tao Te Ching is divided into two parts. The first part of the original text is the Tao Te Ching, and the second part is the Tao Te Ching, without chapters. Later, it was changed to the Tao Te Ching in the first 37 chapters, and the Tao Te Ching in the last 38 chapters, divided into 8 1 chapters.

The text of Tao Te Ching takes "morality" in the philosophical sense as the main line, and discusses the ways of self-cultivation, governing the country, using troops and keeping in good health, but most of them aim at politics. It is the so-called "inner sage and outer king" theory, which has profound meaning and wide tolerance and is known as the king of all classics.