A king

placed his son with a preceptor, and said, “This is your son; educate him in the same manner as one of your own,” The preceptor took pains with him for a year, but without success, whilst his own sons were completed in learning and accomplishments. The king reprimanded the preceptor, and said, “You have broken your promise, and not acted faithfully.”

He replied, “O king, the education was the same, but the capacities are different. Although silver and gold are produced from a stone, yet these metals are not to be found in every stone. The star Canopus shines all over the world, but the scented leather comes only from Yemen.”