The Tao that can be spoken is not the eternal Tao

The Tao that can be spoken is not the eternal Tao
The name that can be named is not the eternal name
The nameless is the origin of Heaven and Earth
The named is the mother of myriad things

Thus, constantly free of desire
One observes its wonders
Constantly filled with desire
One observes its manifestations

These two emerge together but differ in name
The unity is said to be the mystery
Mystery of mysteries, the door to all wonders