From the very first day of his existence man strives to acquire knowledge of everything connected with him and he keeps this in his heart even today.
The treasures of knowledge are stored in shelves of the libraries and he discern knowledge through them (Some libraries have nearly 250000 books)
It is true that some subjects are redundant and some books are mere translations but there is no doubt that they contain priceless realities that are the result of great research in human history. This is over and above those subjects the knowledge of which has been carried with people to their graves. This knowledge compared to that which is not known is like a drop compared with a river or a pebble compared to a mountain.