Look, it cannot be seen - it is beyond form.
Listen, it cannot be heard - it is beyond sound.
Grasp, it cannot be held - it is intangible.
These three are indefinable, they are one.

From above it is not bright;
From below it is not dark:
Unbroken thread beyond description.
It returns to nothingness.
Form of the formless,
Image of the imageless,
It is called indefinable and beyond imagination.

Stand before it - there is no beginning.
Follow it and there is no end.
Stay with the Tao, Move with the present.

Knowing the ancient beginning is the essence of Tao.