Swamiji says :
"…Everything that can weaken us as a race we have had for the last thousand years. It seems as if during that period the national life had this one end in view, viz. how to make us weaker and weaker till we have become real earthworms, crawling at the feet of everyone who dares to put his foot on us. Therefore, my friends, as one of your blood, as one that lives and dies with you, let me tell you that we want strength, strength, and every time strength.
And the Upanishads are the great mine of strength. Therein lies strength enough to invigorate the whole world; the whole world can be vivified, made strong, energised through them. 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, physical freedom, mental freedom, and spiritual freedom are the watchwords of the Upanishads." (CWSV, vol. III, p. 238.)