Daodejing Chapter 1
The way that can be spoken of is not the constant way;
The name that can be named is not the constant name.
The nameless is the beginning of heaven and earth;
The named is the mother of the myriad things.
Therefore, by always remaining free of desire you can observe its secrets;
While by always remaining full of desire, you can observe its manifestations.
The two emerge from the same source,
But they have different names;
Call them both mysteries;
Mystery upon mystery;
The gateway to all secrets.