An old philosopher who had two pupils one day gave each a sum of money, and told them to purchase something with it, which should fill the room where they did their studies. One pupil went out into the market and bought a large quantity of hay and straw, and the next morning he invited his master to see his room, which he had almost filled with the results of his purchase.

'Ah! very good, very good!' exclaimed the philosopher; and now turning to the other pupil, he said, 'Well, friend, and what have you bought?'

'A small lamp and some oil, which will fill the room with light in the dark evening hours. This will enable us to continue our studies by night as well as by day, if we should so wish,' replied the pupil.

'You have made the best purchase,' said the philosopher.

A wise pupil, who profits by instruction, is the delight of the master.