Knowing the constant is called enlightenment

 

Attain the center of emptiness,
Preserve the utmost quiet;
As myriad things act in concert
I thereby observe the return.
Things flourish,
Then each returns to its root.
Returning to the root
Is called stillness:
Stillness is called return to Life,
Return to Life is called the constant;
Knowing the constant is called enlightenment.

 

Tao-te Ching