Suiwo, the disciple of Hakuin, was a good teacher. On a certain day a certain pupil came to him, and Suiwo gave him the problem, "Hear the sound of one hand."
The pupil remained three years, but could not pass the test. One night he came...
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.