Shih-tou Hsi-chien (700-790) was a very well known Chinese Ch'an master. As a young monk, he was one of the disciples of the Sixth Patriarch Hui-neng. After Hui-neng passed away, Shih-tou continued his pilgrimage...
He paid a vist...
Looked at but cannot be seen - it is beneath form;
Listened to but cannot be heard - it is beneath sound;
Held but cannot be touched - it is beneath feeling;
These depthless things evade definition,
And blend into a single mystery.
In its rising there is no light,
In its falling there is no darkness,
A continuous thread beyond description,
Lining what can not occur;
Its form formless,
Its image nothing,
Its name silence;
Follow it, it has no back,
Meet it, it has no face.