The essence of the knowledge of the Vedas was called by the name of Vedanta,which comprises the Upanisadsstrength is what the Upanisads speak to me from every page..therein lies strength enough to invigorate the whole world..they will call with trumpet voice upon the weak,the miserable,and the downtrodden of all races,all creeds,and all sects to stand on their feet and be free.Freedom,phyiscal freedom,mental freedom,and spiritual feedom are the watch words of the Upanisads..the Upanisads are the bBible of India. Swami Vivekananda This Book in two volumes is so popular that it has run into seven rerprints.