When he was young, Cosroes (later on Cosroes I) had a master who managed to make him an outstanding student in all the subjects he learned.
One afternoon, for no apparent reason, the master punished him very severely.
Years later, Cosroes succeeded to the throne. One of the first measures he took was to send for his childhood master and demand an explanation for the injustice he had committed.
“Why did you punish me? You know I did not deserve it”
“When I saw your intelligence, I realized right away that you would inherit your father’s throne,” answered the master.
“And so I decided to show you how injustice is capable of marking a man for the rest of his life.
I hope that you will never chastise anyone without reason.”