A good one

The more you talk and think about it,
The further astray you
Wander from the truth.
Stop talking and thinking,
And there is nothing you
Will not be able to know.
To return to the root
Is to find the meaning,
But to pursue appearances
Is to miss the source.
At the moment of inner enlightenment
There is a going beyond
Appearance and emptiness.

- Seng Ts'an (d. 606)