What exactly does the Tao Te Ching written by Lao Tzu mean?

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.

Tao Te Ching is one of the greatest works in the history of China, which has a profound influence on traditional philosophy, science, politics and religion. According to the statistics of UNESCO, the Tao Te Ching is the most widely translated and published cultural masterpiece except the Bible.