We once went to see the Bhakhra Dam. It is one of the biggest dams and we stayed there for three days. Thanks to the courtesy of the engineer, we got the chance of inspecting the different aspects of the construction work. This dam is built on a river which does not have a perennial stream of water. It is a seasonal river. But the bed of the river is so full of pebbles that the stream can better be called as a river of pebbles. But the ingenious engineer used the pebbles for better work. The huge storage of pebbles was used for the foundation of the dam.
Conveyor belts were created and the pebbles were carried from the bed of the river to the place of the foundation. This was a contrivance to save time, money and energy. The pebbles are the best constituent of the concrete for the foundations. The pebbles were utilized for the more useful work of humanity and thus their life which was apparently purposeless for ages was blessed because of their worthy use. But as the pebbles were moving on the belts, some three or four of them fell down, again to lie idle for millions of ages instead of being used for the great noble work of the dam which was to irrigate thousands of acres of cultivable land to produce the nourishment and food for mankind. Let us not be like those unfortunate pebbles.