Prabhupada: Eight millions. And human being, 400,000 species form, there are. So out of that, the civilized man, the best form of human body, that is meant for this purpose, tapo divyam putraka yena suddhyed sattvam [SB 5.5.1], that: "My dear boys, you should not waste your time simply for finding out the necessities of this body and work very hard day and night and forget your own business." What is that own business? Self-realization, "What I am." This is called own business. "Am I this body or something else?" We can understand it that "I am not this body," because as soon as I, you, leave this body, the spirit soul, it is nothing but lump of matter. That we can understand. That is the beginning of Bhagavad-gita lesson, to understand that "I am not this body." If we live under the conception that "I am this body," then, the sastra, Vedic literatures, condemns, "Then you are no better than the cats and dogs, because they also live under the bodily concept of life." And if you do not understand that you are not this body, you are spirit soul and you are changing different forms of body for realization of the higher, the highest goal of life... That you should understand. That is called tapasya.
By H.D.G.Srila Prabhupada
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