The Tao Te Ching is traditionally ascribed to Lao Tzu — the "Old Master" — an archive-keeper said to be a contemporary of Confucius. Most modern philology, however, treats the text not as the work of a single person but as a compilation of a wisdom tradition that accumulated around the fourth century BCE. The silk and bamboo manuscripts unearthed at Mawangdui in 1973 and at Guodian in 1993 show the book circulating in fluid form between the late fourth and the second century BCE. The question of "who really wrote it" does not touch the philosophical force of the work.

At its centre stands the Tao — the "Way". The Tao is not a nameable thing; the opening line says so: "The Tao that can be spoken is not the eternal Tao." It is the self-running flow of the universe, and there is no need to assign it a direction, a purpose, or a divinity. The human task is not to resist this flow but to take part in it. That participation is named wu wei — often translated as "non-action", but better understood as unforced action that does not bend the grain of nature. Water is the book's favourite image: the softest of things, it wears down the hardest rock over time; it flows to the lowest place, does not contend, and prevails.

Lao Tzu's ideal person resembles an uncarved block — pu: rough wood that has not yet been worked, divided, or turned into any particular thing. Where Confucius stresses ethics, ritual, and social order, the Tao Te Ching says the opposite: the more rules you make, the more thieves there are; the more wisdom you teach, the more deception arises. The ideal ruler is an invisible ruler; when the people finish their work, they say, "we did this ourselves." This political minimalism is a current that classical China read for centuries in tension with the Confucian state.

The Chinese tradition names its three great teachings — Confucianism, Daoism, and Buddhism — together as san jiao, the "three teachings", treating them not as rivals but as complementary: one is Confucian in society, Daoist in nature, Buddhist before death. The Tao Te Ching is the kernel of Daoism, later expanded by the humorous metaphors of Zhuangzi, and it has left deep traces on Chinese medicine, martial arts, landscape painting, poetry, and even modern ecological thought. Roughly 5,000 characters long, it is among the most translated books in the world; from the nineteenth century onward it has found readers in the West ranging from Heidegger to Ursula K. Le Guin.