I came across this passage a few years ago, and while I couldn’t initially appreciate the depth of what the Old Master was trying to convey, there are some days now that I read these words in a state of awe.

The Way that words can tell is not the eternal Way.
The name that words can name is not the eternal name.
The nameless is the source of heaven and earth.
The named is the mother of myriad forms.

Free from desire: behold the unknowable.
Filled with desire: behold the visible.

Being and non-being springing from the source, and differing only in their name:
this is the deepest mystery, the darkness of the dark, this is the gateway opening to the All.

– Laozi, from the Tao Te Ching