Chapters 11, 42 and 2 of the Tao Te Ching
The Tao is the ultimate void/emptiness (the "pregnant void"), as ultimate container of everything that is potential, the source of chi, that ushers forth all potentiality
Thirty spokes join in one hub
In its emptiness there is the function of a vehicle
Mix clay to create a container
In its emptiness, there is the function of a container
Cut open doors and windows to create a room
In its emptiness, there is the function of a room
Therefore, that which exists is used to create benefit
That which is empty is used to create functionality (11)
Tao produces one
One produces two
Two produces three
Three produces myriad things
Myriad things, backed by yin and embracing yang
Achieve harmony by integrating their energy (42:1-9)
When the world knows beauty as beauty, ugliness arises
When it knows good as good, evil arises
Thus being and nonbeing produce each other
Difficult and easy bring about each other
Long and short reveal each other
High and low support each other
Music and voice harmonize each other
Front and back follow each other
Therefore the sages:
Manage the work of detached actions (wu wei - act without acting)
Conduct the teaching of no words
They work with myriad things but do not control
They create but do not possess
They act but do not presume
They succeed but go not dwell on success
It is because they do not dwell on success
That it never goes away (2)
The Manifest and its Integrated Unity are to be found in the Yin Yang