The story of Education

One night,  three horsemen were riding across a desert. As they crossed the dry bed of a river, out of the darkness a voice called "Halt!"
They obeyed. The voice then told them to dismount, pick up a handful of pebbles, put them in their pockets and remount.
The voice then said, "You have done as I commanded. Tomorrow at sun-up you will be both glad and sorry." Mystified, the horsemen rode on.
When the sun rose, they reached into their pockets and found that a miracle had happened. The pebbles