When light passes through a medium it changes its colour according to medium’s colour. A red flower which is being seen through green glass seems to be black and when it is being seen through yellow glass it seems to be pink or orange. This fact can be seen not only in the field of physics but also in the field of human behavior too. Explanations of different books, poems and moral sayings are always given by people according to their attitude. Especially religious books are generally interpreted by people and groups according their prejudice. An indifferent observation is very difficult.