He who knows others is wise, and he who knows himself is wise. He who conquers others is powerful, and he who conquers himself is strong. The one who is content is rich, the one who is strong is determined, the one who does not lose his place is long-lived, the one who dies but does not die is long-lived.

This sentence comes from Chapter 33 of Laozi's "Tao Te Ching".

Translation

He who understands others is wise, and he who understands himself is wise. Those who can defeat others are powerful, and those who can defeat themselves are even more powerful and invincible. He who knows contentment is a rich man. People who persist in doing what they do have ambition. Those who do not lose their duties can live a long life, and those who still have the "Tao" despite their physical death can be considered truly long-lived.

About the author

Laozi, also known as Lao Dan and Li Er, is a great philosopher and thinker in ancient my country and the founder of the Taoist school. He was named Taishang Laojun by Emperor Wu of the Tang Dynasty, a world cultural celebrity, and one of the world's 100 historical celebrities. The Tao Te Ching (also known as "Laozi") exists in the world. The essence of his works is the simple dialectics and advocates inaction. And Zhi, his theory has a profound influence on the development of Chinese philosophy. In Taoism, Laozi is revered as the ancestor of Taoism.

Lao Dan (dān) (approximately 571 BC to 471 BC), named Boyang, posthumous name Dan. Also known as Li Er (in ancient times "Lao" and "Li" had the same pronunciation; "Dan" and "Er" had the same meaning). He was born in Qurenli, Li Township, Ku County, Chu State (this place was originally a feudal state of Chen in the Western Zhou Dynasty, now Luyi, Henan, and there is dispute in Woyang, Anhui). One of my country's greatest philosophers and thinkers, he is respected as the ancestor of Taoism and a world cultural celebrity.