The day had arrived for the son to return from his studies and the old man waited at the door for his son.
The young man went back to his master and asked him to teach him what cannot be taught.
"Go away to the mountains with these four hundred sheep and come back when they are one thousand", said the master.
The sheep did not understand his language. In his desperation, he would talk to them but they would look back at him as if to say he was stupid.
End.