The three sentences that Taoists must memorize are: governance by inaction, existence and non-existence, and Tao follows nature.

Taoist thought was founded by "Laozi" in the late Spring and Autumn Period. Laozi's unique understanding of the universe, world, society and life shows eternal value and vitality in philosophical thought. The main theme of his thoughts can be condensed into 12 words, that is, three mantras: governance by inaction, existence and non-existence, and Tao follows nature.

1. Governing by doing nothing: Emphasizing that when governing society and dealing with problems, we should adopt an attitude of governing by doing nothing. That is to say, we do not forcefully interfere with the development of nature and individual behavior, but comply with the laws of nature and guide the change and development of things in a natural way.

2. The interdependence of existence and non-existence: emphasizing the mutual causality, mutual generation and mutual restraint between existence and non-existence, existence and non-existence. It is believed that all things in the world are interconnected and dependent on each other, and existence and non-existence, existence and non-existence are complementary and mutually reinforcing.

3. Tao follows nature: emphasizing that both Tao and law originate from nature and follow the principles and laws of nature. Tao is the origin of the universe and the universal moral principle. Laws manage and regulate human behavior according to the principles of Tao. Harmony and development of individuals and society must be achieved in a way that conforms to nature and conforms to the Tao.

The historical background of the ancient philosopher "Laozi"

Laozi, also known as Li Dan, is an ancient Chinese philosopher and one of the founders of the Taoist school. Laozi lived in the late Spring and Autumn Period and the early Warring States period from the end of the 6th century BC to the beginning of the 5th century BC. It is said that he was a native of the Wei State (now southern Hebei Province). There is not much exact information about Lao Tzu's historical background, and many legends about Lao Tzu are also mixed in, making Lao Tzu's true life experience unclear.

Laozi is famous for his "Tao Te Ching", which is one of the core classics of Taoist philosophy and an important heritage of ancient Chinese culture. His ideological advocates emphasize "Tao" (the principle of governing by doing nothing), advocate people to follow nature, pursue inner peace and freedom, and oppose artificial power and desires.