Tao Te Ching

The following lines are from a 2400 year old book by Lao Tzu. It's called Tao Te Ching..

Not by its rising is there light,
Nor by its sinking is there darkness
Unceasing, continuous
It cannot be defined
And it reverts again into the realm of nothingness
That is what its called the form of the formless
The image of nothingness
That is elusive
Meet it and you do not see its face
Follow it and you do not see its back
He who holds fast to the quality of the old
Is able to know the primeval beginnings
Which are the continuity of quality..