the cage it called

Whatever he was asked about Zen, Master Gutei simply stuck up one finger.

He had a boy attendant whom a visitor asked, “What kind of teaching does your master give?”  The boy held up one finger too.  Hearing of this, Gutei cut off the boy’s finger with a knife.  As the boy ran away, screaming with pain, Gutei called to him.  When the boy turned his head, Gutei stuck up one finger. 

The boy was suddenly enlightened.

a Phosphorescent song