Tao Te Ching (6th cent.BC) Lao Tzu

Chapter 4

The Tao is empty
When utilized, it is not filled up
So deep! It seems to be the source of all things

It blunts the sharpness
Unravels the knots
Dims the glare
Mixes the dusts

So indistinct! It seems to exist
I do not know whose offspring it is
Its image is the predecessor of the Emperor