Daodejing ch 4:
The Way is so vast that when you use it, something is always left.
How deep it is!
It seems to be the ancestor of the myriad things.
It blunts sharpness
Untangles knots
Softens the glare
Unifies with the mundane.
It is so full!
It seems to have remainder.
It is the child of I-don't-know-who.
And prior to the primeval Lord-on-high.