In Laozi's Tao Te Ching, don't make promises easily. The sincere sentence is "light promises, but heavy promises;" Easy is difficult. " This sentence means that people can't make promises casually. People who make promises casually must be hard to do, and they become people who don't keep their promises.

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.