Millions of years ago man lived a very miserable life,he had no means to communicate with world and even he had no basic facilities but now in modern times man can enjoy every possible facilities.This is due to difference   between knowledge of man.

   Knowledge   may be defined as   a set of information about  different  fields of life.In ancient times man was helpless towards different disasters and animals but he have made his defense much stronger then it was in early times.This is also due to his advancements of knowledge. Through knowledge man gained a lot of mental power and strength.

           Art,literature,astronomy,biology,chemistry,physics,music,poetry,philosophy     etc   show man’s   advancements in knowledge.This does not stops there,through knowledge he   have taken the control of   nature.Now man can easily   search whatever he wants even he can explore vast seas and space.

   Through knowledge man built towering buildings even inside the rivers.We must use knowledge for the welfare of humanity   in the best possible way. Man should not  feel  pride over his knowledge because in doing so he would be unable to search the secrets of his life and this world.