Once there was a very wise and powerful herbalist.  He knew the secrets of the
trees and the earth.  He could make wonderful medicines from roots and leaves. 
There were always great numbers of people waiting in his compound to be treated
and healed.  He cured many and his name had spread throughout the whole
country.  But he was getting old.  His son was preparing to be an herbalist too,
but when he asked the old man to explain the secrets and how to prepare the
medicine, the old man would simply say. "Go back, you are not yet ready."  One
day the boy knocked on his father’s door and there was no answer.  When he went
in he found his father dead.  Everyone in the town was very sad about his
death.  They had lost a good friend who had healed them when they were sick but
even worse; they had lost his secrets and his medicine.  They all knew this was
a great waste.